IMO youre being a bit unfair. There has to be an aftermarket p/up system that you could install that would be BETTER that the original? fair enough it might cost more than the guitar is worth, but the value is in how much you like the guitar and not the money. I have an $80 antoria bass and I have spent well over $150 on getting setups, p/ups, pots and machine heads that now make it brilliant. I would never sell it and wouldnt expect to get what ive spent on it if i did.
This sort of problem isnt limited to washburn as Im sure youre aware, ALL manufacturers products have problems at some point and if your guitar is out of warranty then what else do you expect? Im almost certain that other guitar makers would give you a similar response.
If the guitar isnt worth fixing to you sell it and buy something else.
Gordon Smith GS2
80's Korean Strat
Warwick Streamer LXBN 5 string
Warwick Streamer 4 string
Antoria Star Bass