I never fail to be amazed at the value people put on their old junk. I've seen second hand boots, bought for £60, selling for £55 plus money for petrol/delivery. BARGAIN! I had a friend who tried to sell her knackered £100 Juicy Couture bag for £85. I tried to explain that a 15% saving isn't an awful lot considering she'd been using is for years, to no avail.
I wonder if anyone is actually buying this second hand stuff to save a couple of pounds, especially as its often impossible to tell the condition until you pick it up. I'd much rather have a scout through the sales, you'd probably find better discounts!
(That being said, I'm a massive fan of buying second hand, and it was a godsend when I needed to furnish my flat on the cheap)