The one club
A used 56° wedge, mid bounce
The most useful club in the bag and the easiest to buy badly. Skip anything with a worn face — the grooves are the whole product — and skip the boutique grinds unless you know exactly what bounce you need. A five-year-old wedge with a clean face does everything a new one does, for a quarter of the money.
Check three things before you pay: face wear in the centre, a ferrule that hasn't been twisted by a bad regrip, and a shaft that matches your irons in flex. Anything else is cosmetic.