Yes its funny what things go for. I have some traditional antiques - collectables such as stuff from Coronation, Charles and Diana, pottery. But people just do not want it all. Find the old machines are selling really well. I'm having a global clearout and find stamps [presentation packs] are worthless and I'll be cashing in for the value of the stamps. Old magazines are also poor. Having an antique sewing machine: just saw one sell for £5 on ebay that worked. Its crazy the value of traditional antiques seems to have hit rock bottom.
Perhaps if you are a collector, now is a good time to buy. I'm keeping some things, but getting shot of most things as I'm fed up with the space it takes. Still I'll hedge my bets and keep some items like the ZX80 and ZX81 and a few Sinclair calculators. I sold a QL for £200 recently, so there is a market for retro computers out there. However just do not have the time to play with them all or the patience to store them.