God knows!!! I'd guess at a price of £400 -£600 depending upon time of year etc....
If you're up for selling now - I'd stick em on ebay with low starting price and a reserve of £500 and keep an eye on it.
If you don't get near the price, but get plenty of bidders, you can always keep a note of the bidders' i.d.s and contact them afterwards to see if they'll do a deal!!
Tim
