I have some .cos and I wouldn't be able to sell them either. I've noticed the greatest success with .com keyword domains. I usually look to have at least 20 or more endusers for a domain. ie: Game-Calls dot com. Type "game calls" in google and you'll see what I mean. Also sold custom-jewelry dot net(haven't sold any other .nets with a hyphen). If you were to type "custom jewelry" you will see how many domains use it in their name. I also own custom-cakes dot net and custom-guns dot net (both have lots of endusers but none interested). I'm not going to buy anymore .nets with hyphens. I'm also not to fond of brandable names for quick flipping, which is what I'm looking to do. I know they're good for long term but I'm looking for quick sales for profit.