I usually run into a decent number of lower ball offers however what I find more is people who are (very) interested one day and then the very next are not aka flake. However I generally never have an issue selling something eventually. I stick to my guns on the price, which is fair anyways, and I don't let the flakes bother me. I may lower the price a bit if I am looking to sell something a little quicker. If someone wants what I am selling bad enough they'll make it happen. You can always sell to a chain like Guitar Center but most times they'll screw you on what they'll give you for it, especially in cash value.