Yucso is a nice 5 letter domain, I like it. The thing about those type of names though is that they don't mean anything so you have to create like, a new idea on there. They are probably good for selling to businesses who are starting up a cool new idea or app. Price wise, it's very hard to tell, anywhere between $100 - $2000 depending on how badly the buyer wants it. If they want it enough, it could be even higher.