Finding nice comics in the UK at flea markets etc is almost impossible, (especially US silver age), but it does happen from time to time. This summer I got a tatty copy of ASM 77, plus a Good copy of the Superman / Ali treasury
But what stood out for me (and UK boardies will appreciate these), are Mighty World of Marvel Issues 1 and 2, Nabbed at a boot fair in August for the princely sum of £1 (50p each).
I used to have these when I was a kid. Couldn't believe my luck.
Sorry about scans cropping, these issues are too large for the scanner!