It's going to be a tough time to sell off new gear in the next month or two.
After NAMM everyone's going to be looking for the hot and sexy new gear and won't be all that interested in buying used.
The absolute worst time to sell used gear though, is during the summer. People have made all their vacation plans and won't spend on new stuff unless they absolutely need to.
All the same , keep your ads up for a month or two at a time and keep a decent reserve price and eventually someone will buy your kit.
It's like trout fishing. You just have to sit there and be patient and courteous to every moron who makes a lowball offer until someone makes a decent one.
Gary