£1k for an SH101, jesus. I remember well the period when a 303 went from being worth £100 to about £1k in 6 months.
That's the problem with the Music Industry Rich, the moment an "Industry Standard" ceases to be produced, it sends the market prices sky high, and even more so if nothing else has come out to replace it! Check out the silly prices that Yamaha NS-10's go for these days, compared to when they were new.
If you've got an iPhone, download the "IR-909" application and have a play… It's only £2.99 (or it was, might be free now), but it's got a 303, 606, 808 and a 909 (as well as some other newer synths) built in to play with on your iPhone… HOW COOL!!!
Or if you can find a copy of ReBirth by Propellerheads (software company not band) then have a play with it on the PC… Alternatively, most software sequencers have got all the legendary sounds built in now anyway, though it's not as cool as playing with the old school hardware I suppose.