Hmm, have to think about that one.....
Off the top of my head...
Spitball Sparky (pretty rare game and watch) for 50p
Boxed mint 32X still with free vouchers even, FREE
Big bundle of stuff given to me when I was owed some money, including Multi-Mega
(a long time ago) 2 NESses, one modded to play US games, boxed Power Glove, boxed U-Force, loadsa games for I think it was £25
Boxed NES, early mattel version with ROB, was about £8 with a loada games
(not exactly video game) CGL M5, free