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Live · checked today · 6 UK retailers tracked
Callaway BIG Bertha B21 Iron Set vs Callaway Quantum MAX OS Iron Set
Quick verdict
Checked daily across 6 UK retailers
Price and availability verdict
Callaway BIG Bertha B21 Iron Set is currently £449.99 used, while Callaway Quantum MAX OS Iron Set is currently £699 used. Deal scores are Callaway Quantum MAX OS Iron Set 61/100; against tracked history, Callaway BIG Bertha B21 Iron Set is 14% above its lowest tracked price and Callaway Quantum MAX OS Iron Set is 399% above its lowest tracked price. Callaway BIG Bertha B21 Iron Set is currently available from 1 UK retailer, versus 5 for Callaway Quantum MAX OS Iron Set.
Callaway
BIG Bertha B21 Iron Set
£449.99 used No change at its low Buy £449.99 → at Nearly New Golf ClubsCallaway
Quantum MAX OS Iron Set
£749 used from £699 No change at its low Buy £749 → at Golf Gear DirectDeal intelligence
Should you buy now, or wait?
Neither is at its low today. The Callaway BIG Bertha B21 Iron Set is closest, within 14% of its lowest tracked price. The Callaway Quantum MAX OS Iron Set has more room: its tracked low is £150.
Callaway · BIG Bertha B21 Iron Set
Not enough data yet
Today £909 · typical £909 · lowest £799
On sale 1 time in the last 3 months
Callaway · Quantum MAX OS Iron Set
Good deal today
Today £749 · typical £749 · lowest £150
On sale 1 time in the last 5 months
Head to head
Category leaders, from the data on this page
- Cheapest new BIG Bertha B21 £449.99 vs £749
- Closest to its tracked low BIG Bertha B21 14% above vs 399%
- Most retailers in stock Quantum MAX OS 5 vs 1
- Cheapest used BIG Bertha B21 from £449.99 vs £699
Where to buy
6 UK retailers, checked daily
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.
Callaway · BIG Bertha B21 Iron Set
No change
since 13 February 2026
Lowest £799 on 16 March 2026
Callaway · Quantum MAX OS Iron Set
↓ £151
since 13 February 2026
Lowest £150 on 4 March 2026
New vs used
From used listings we track
Callaway · BIG Bertha B21 Iron Set
NEW £449.99
USED FROM £449.99
Callaway · Quantum MAX OS Iron Set
NEW £749
USED FROM £699
Used prices average 93% of new · 1 used listing tracked
Availability by build
Which configurations are in stock right now
| Build | Callaway BIG Bertha B21 Iron Set | Callaway Quantum MAX OS Iron Set |
|---|---|---|
| Regular | — | 4 retailers · from £749 at Golf Gear Direct → |
| Regular · Left-hand | — | 2 retailers · from £899 at Affordable Golf → |
| Stiff · Left-hand | — | 2 retailers · from £899 at Affordable Golf → |
| Stiff | — | 2 retailers · from £899 at Affordable Golf → |
| Regular · Left-hand · Used | 1 retailer · from £449.99 at Nearly New Golf Clubs → | — |
| Standard | — | 1 retailer · from £899 at Affordable Golf → |
| Senior · Used | — | 1 retailer · from £699 at Preowned Golf → |
| Left-hand | — | 1 retailer · from £899 at Affordable Golf → |
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Common questions about the Callaway BIG Bertha B21 Iron Set vs Callaway Quantum MAX OS 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.