Yesterday the strap on my much used rucksack broke but , by coincidence, one of the charity shops I visit on the way home had a selection of rucksacks in that day which were quite a cheap price. so I bought 2. Timely and a great buy.
Other good buys:
my crosstrainer, not spectacularly cheap but a good one and I've used it quite a bit
classical guitar £4, broken strings but with new £3 strings it sounds great.
touch sensitive electric piano £25
upmarket digital radio, cd player, alarm etc. £3 still currently on amazon at well over £100
as new king size bed free apart from £20 delivery
my fav coat free
vinyl lp prob 50p book says is worth £80

Just a few that I can think of. What are yours?