has anybody used these tyres (michilin fr 2-0 slicks) they are on ebay for £60,im thinking off getting them,whats the were rate,will they last for a full trackday?

I've used them on the front of my car, with 22/54x13s on the rear. Generally get a few trackdays out of a set. It depends on tracktime, and how hard they're used I suppose..