That could be your problem. List it at higher prices or people think what you are selling is somehow defective. It's worth a shot. I know it sounds weird but I had a Viper listed at rock bottom and couldn't get a bit just one ultra lowball offer that was laughable. I raised it by two hundred bucks and it sold a week or two later.
I just sold some guitars to get a Martin D-28. I'm starting to focus on a certain group of guitars and happy with a small stable. A few Les Pauls and then a Strat, Charvel, Chubtone, etc.