Quick answer
Price alerts for coins work by monitoring realised auction results and notifying you when a target coin sells above a threshold, below a floor, or appears in an upcoming auction. MyCoinage Pro delivers alerts by email and in-app; for DIY alerts, Spink and Noonans publish auction calendars you can subscribe to manually.
TL;DR
- Alerts save serious collectors hundreds of pounds a year by catching market moves early
- Three alert types matter: upcoming-auction, realised-price-threshold, and watchlist-match
- Email-only alerts are fine; push notifications are better
- DIY alerts (RSS, Google Alerts, auction calendars) work but are noisier
- Alert fatigue is real, set fewer, better-tuned alerts
Table of contents
- Why price alerts matter in numismatics
- The three alert types
- Setting up alerts in MyCoinage
- DIY alert systems
- Tuning alerts to avoid fatigue
- Examples of alerts that paid off
- Common questions
- FAQ
Why price alerts matter in numismatics
Coin markets are lumpy. A rare 1887 proof sovereign might see three sales in a year, and a collector who misses all three has learned nothing about current market pricing. Worse, a collector who needs to buy one misses the chance because the sale happened without their knowledge.
Alerts are the solution. At their simplest they're a notification when a coin you care about is offered for sale or has just sold. At their most sophisticated they layer on price thresholds, grade matching, and provenance filters.
The behavioural angle
Collectors check auction sites for an hour a day when they're active and then forget for three weeks. Alerts remove the check-and-remember tax, you don't need to remember, you'll be told.
The three alert types
| Alert type | Triggers when | Use case |
|---|---|---|
| Upcoming auction | A target coin is listed in a forthcoming sale | Bidding preparation |
| Realised-price threshold | A target coin sells above/below a price | Market-move awareness |
| Watchlist match | Any coin on your watchlist has activity | Daily overview |
Upcoming auction
The earliest alert. Spink, Baldwin's and Noonans publish auction catalogues 4-6 weeks before the sale. An alert pings you when your target appears, giving time to register to bid, commission a viewing, or budget accordingly.
Realised-price threshold
Most useful for portfolio tracking. If you own a 1902 proof sovereign and the realised price spikes 20%, you want to know, either to reconsider selling, or to recalibrate your insurance valuation.
Watchlist match
A daily digest of any movement on watchlisted coins. Lower urgency but fills gaps the other two miss.
Setting up alerts in MyCoinage
MyCoinage Pro offers alerts at three levels:
- Per-coin alerts. Navigate to any coin in the catalogue, click the bell, set threshold. Email plus in-app notification.
- Watchlist-level alerts. Any movement on any watchlisted coin, batched into a weekly digest.
- Portfolio alerts. When your total portfolio value moves more than a configurable percentage (default 5%).
The notification channels
- Email, default
- In-app, always on for Pro users
- Push notification, planned (in development as of 2026)
Alerts can be silenced in account settings at any time.
Alert delivery speed
Auction-listing alerts fire within 24 hours of a catalogue being published. Realised-price alerts fire within the hour the auction closes (the price pipeline refreshes hourly). Watchlist digests deliver Sunday evenings by default.
DIY alert systems
Without an app, you can build alerts using free tools:
Google Alerts
Set alerts for "1887 sovereign" auction and variants. Catches news and blog coverage. Weak for specific auction listings but free.
RSS from auction houses
Spink, Baldwin's and Noonans all publish auction catalogues as RSS or accessible feed URLs. Pipe them through Feedly or NetNewsWire and you'll get every new catalogue automatically.
Email subscriptions
Direct signup at Spink, Baldwin's, Noonans, and eBay's "saved searches" feature. Low-tech but effective.
The limitation
DIY alerts don't match your specific collection, they match queries you define. If you own 40 coins, setting 40 Google Alerts becomes noisy. App-based alerts integrate with your catalogue so "alert me on my watchlist" just works.
Tuning alerts to avoid fatigue
The most common alert failure is getting too many and muting them all. Rules of thumb:
- Start with 10 alerts, not 100
- Set thresholds at 10%+ price moves, not 1%
- Prefer weekly digests over instant alerts for most coins
- Reserve instant alerts for your top 5 most-wanted pieces
- Review alerts quarterly, delete the ones that never triggered meaningfully
The goldilocks zone
Roughly one actionable alert per week is the sweet spot. Zero alerts means you're missing things; five a week means you'll start ignoring them. See the rare UK coins list for good candidates, rare coins trigger rarely, common coins trigger constantly.
Examples of alerts that paid off
Case 1: The 1905 half-crown
A collector watchlisted 1905 half-crowns. In March 2025 an EF example appeared at Noonans with an estimate of £4,000-£5,000. The alert fired 28 days before the sale. The collector registered, viewed, bid, and won at £4,400 hammer. Market realised-price at that grade subsequently rose to £5,200 in late 2025, a 15% paper gain from alert-driven timing.
Case 2: The duplicate sovereign sell
A collector held three 1899 sovereigns in VF. An alert flagged a realised-price move from ~£380 to ~£450 across three sales in two months. The collector sold one sovereign at £460, keeping two. Net gain: ~£80 versus holding, with no change in collection completeness.
Case 3: The catalogue error
A Baldwin's catalogue misdescribed a coin as an 1893 Jubilee when it was the rarer Old Head variety. An alert fired; the collector spotted the error, bid accordingly, and acquired a coin worth £1,200 for £380. Rare but real, alerts surface catalogue anomalies faster than manual browsing.
Common questions
Are alerts worth a subscription?
For collectors who buy or sell more than once a year, yes easily. For collectors who haven't transacted in 3+ years, probably not.
Do alerts work for circulation finds?
Partly. You can watchlist the rare coins likely to surface in change (rare 50ps, error coins) and get a heads-up when examples sell on eBay. Won't help you find one in your own change but calibrates what to look for.
What about alerts for bullion spot price?
MyCoinage's metals page shows live spot. Dedicated bullion apps (BullionVault, Goldmoney) offer spot-price alerts if you need instant notifications.
Can I alert on grade upgrades?
Not directly, grade is a fixed property. But a grade-conditioned price alert (1887 sovereign, grade EF, above £340) effectively tracks high-grade market moves.
FAQ
Q: Do I need to be Pro to use alerts?
A: Instant alerts yes, Pro only. The free tier sees the weekly leaderboard digest.
Q: Can I alert on a specific auction house only?
A: Yes, filter by source in alert settings.
Q: What if an auction happens outside the UK?
A: MyCoinage tracks PCGS certified sales (mostly US) alongside UK auctions. International auction coverage depends on the auction house's publication. Heritage Auctions' UK-coin sales are tracked.
Q: Do alerts slow down when markets are quiet?
A: The alert system fires on actual events. If no auctions happen, no alerts fire. Quiet markets = quiet inbox.
Q: Can I share an alert configuration with a friend?
A: Not directly, but watchlists are exportable to CSV. Two collectors can maintain parallel watchlists if they want to coordinate.