72 nova

i have a question for any guru's out there. Last year i bought a 72 starcraft nova in good shape from what i know(first boat purchase) i think its original but no knowledge on that either, i thought about selling it to get a newer bigger boat(19') open bow. on the Nova the reverse doesnt work but everything else is in working order. i dont boat that often due to other summer toys,i thought about getting reverse fixed but dont want to dump anymore money in it cause i put $400(i know its not alot) to try to fix at boat mechanic, replaced shift cable which didnt do the trick and replaced lower unit oil which failed also. the guy who has worked on johnsons forever said the solenoid might be bad or the blocking diod.(both cost money) My question is does anyone have a idea what they would sell this boat for? im torn between keeping it and possibly fixing or dealing with no reverse or just selling it as is. appreciate any feedback that your able to give. thank you.