i don't buy that mikey. sorry but you need to know what is wrong to work out the cost. secondly, because you don't need this bike to commute to earn your crust it means to me that you can hold onto it while you build up the funds. to freeze this issue if you like.
nobody is going to offer you a price that isn't a bargain to them because thewy also don't know what is wrong!
regards
Taffy