To be honest the best bargain I got was probably something I pointed my dad in the direction of. Dell Vostro 430 (i7-860, 4GB RAM, 500GB HD, Radeon HD4350, Win7 64bit Professional), came in around £450 with a few voucher codes back in March I think for the full kit including keyboard and mouse. It's actually a very slick piece of kit, looks great, incredibly quiet. 9 months later and to get that spec from Dell now sets you back at least an extra £100.
I did get a Flip HD 8GB Camcorder for about £80 a few months back (well over £100 everywhere else) but the joke is on me because it has just sat in it's box not being used.
Few cheap games in sales but nothing to write home about.
Actually thinking about it the best bargain I had was from Burtons:
Suit Jacket
Suit Trousers
Shirt
Tie
Shoes
£89.10 all-in including delivery. Never bought clothes online before so was a bit of a punt but I needed a new suit and figured even if something didn't fit it was worth it for the rest of the gear. I'm actually delighted with the shoes and if I'd gone out to buy all this stuff seperately I'd have probably been looking at something well in excess of £150.