Presumably less than this one:
Mint Avon Searider SR4 £3995
As its in mint condition, with a newer engine (although smaller) and less electrics
SR4s seem to get listed regularly in any state on fleabay. Many with a reserve of £2k and some even sell! Some far worse than yours sounds and others in very good nick... I suspect location has a lot to do with it... yours will be in yorkshire which if there is someone in yorkshire looking for one may mean they'll pay a few quid extra to save the travel, on the otherhand there is more likely to be people on the South Coast looking and so more chance they will get in a bidding fight over a southern boat as it avoids the journey up norf to get it...