Are there any pawn shops or consignment shops within driving distance? I sold my old acoustic Yamaha for $150 on consignment (which meant I got $125), after buying it for $100 years ago. A guitar's value should increase, you know, if it is taken care of.
My feeling is that people don't go looking online for used guitars (unless it's vintage). They head to the pawn shop for that.
Good luck
"It's all right son . . . we told you what to dream"