I see you have started several threads concerning extensions. IMO anything is good if you have a buyer for what you're selling and you'll never know unless you test the water.
.mobi was good when there was "mobile" websites, now websites are responsive (the same domain works for mobile and desktop) so there is no need for .mobi anymore
Everything except .com is not worth anything. Thousands of domainers lost money investing in such crappy extensions, now same happens with all new tld's.