Well, I think it depends on the domain, but if you can sell it for $100, then I would say go for it. With .11 aday, you would make like $40 a year, but minus the reg. fee. So lets just say $32 total profit per year. You have to figure that traffic will eventually start going down, and therefore your profits would as well. You would have to keep it for like 4 years to make the same as just selling it now. Good luck,
Tom