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Live · checked today · 3 UK retailers tracked
John Letters Mm-Forged Prototype Iron Set vs Mizuno JPX 921 HOT Metal PRO Iron Set
Quick verdict
Checked daily across 3 UK retailers
Price and availability verdict
John Letters Mm-Forged Prototype Iron Set is currently £99.99 used, while Mizuno JPX 921 HOT Metal PRO Iron Set is currently £449.95 used. Against tracked history, John Letters Mm-Forged Prototype Iron Set is at its lowest tracked price and Mizuno JPX 921 HOT Metal PRO Iron Set is at its lowest tracked price. John Letters Mm-Forged Prototype Iron Set is currently available from 1 UK retailer, versus 2 for Mizuno JPX 921 HOT Metal PRO Iron Set.
John Letters
John Letters Mm-Forged Prototype Iron Set
from £99.99
at The Second Hand Golf Shop · 1 retailer
Lowest £100 · lowest price we’ve seen
Mizuno
Mizuno JPX 921 HOT Metal PRO Iron Set
from £449.95
at Replay Golf · 2 retailers
Lowest £450 · lowest price we’ve seen
Discount vs RRP
Price vs usual
Where to buy
John Letters Mm-Forged Prototype Iron Set
Where to buy
Mizuno JPX 921 HOT Metal PRO Iron Set
Deal intelligence
Should you buy now, or wait?
John Letters · Mm-Forged Prototype Iron Set
Not enough data yet
Mizuno · JPX 921 HOT Metal PRO Iron Set
Not enough data yet
Today £449.95 · typical £779 · lowest £449.95
On sale 1 time in the last 4 months
Head to head
Category leaders, from the data on this page
- Cheapest new Mm-Forged Prototype £99.99 vs £449.95
- Most retailers in stock JPX 921 HOT Metal PRO 2 vs 1
- Cheapest used Mm-Forged Prototype from £99.99 vs £449.95
Price trajectory
How each has moved since we started tracking
Lowest tracked price per day, any condition. Caddence tracks both daily. Shaded spans are days we couldn’t collect prices — the lines break rather than guessing.
Mizuno · JPX 921 HOT Metal PRO Iron Set
↓ £449.05
since 21 February 2026
Lowest £449.95 on 28 July 2026
New vs used
From used listings we track
John Letters · Mm-Forged Prototype Iron Set
NEW £99.99
USED FROM £99.99
Mizuno · JPX 921 HOT Metal PRO Iron Set
NEW £449.95
USED FROM £449.95
Availability by build
Which configurations are in stock right now
| Build | John Letters Mm-Forged Prototype Iron Set | Mizuno JPX 921 HOT Metal PRO Iron Set |
|---|---|---|
| Stiff · Used | 1 retailer · from £99.99 at The Second Hand Golf Shop → | — |
| Light · Used | — | 1 retailer · from £449.95 at Replay Golf → |
| Regular · Used | — | 1 retailer · from £449.99 at Nearly New Golf Clubs → |
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Common questions about the John Letters Mm-Forged Prototype Iron Set vs Mizuno JPX 921 HOT Metal PRO Iron Set
Prices shown are the cheapest in-stock price per retailer tracked by Caddence, updated daily. Always confirm the final price on the retailer's site.