My dads good friend (the Ex-Engineer) passed away recently, 50% of proceeds go to Parkinson's disease charity.
Amongst many other things (ask if you are after something obscure and imperial) he has a vast stock of unused as well as used Tap's & Die's, £10 per item, Tap's are often in sets of 3.
BSF, UNC & UNF , Witworth. Some metric items too. Any reasonable offers considered.