Originally Posted by RummyBoy

The questions to ask:

(1) Has he ever run an online business before?
(2) If yes to (1), did he ever run it on a domain like a .co or a .net?
(3) If yes to (2), did he ever find that he lost all his customers to the .com
(4) If yes to (3), did he then regret using a domain other than the .com
(5) If yes to (4), then why did he start a business on a domain other than a .com?
(6) If no to (4), then he probably didn't have enough traffic to lose any custom.

It's been said time and time again, NEVER ever start an online project (except in rare situations where its a very limited thing like a non-online business with a simple web presence) on a domain that is not .com - you will regret it.

If you get any kind of traffic, whether its .net or .co, you will lose a large proportion of your traffic to the .com because people will NEVER remember the extension and will always just assume your site is .com

Again, what I say is valid if you expect a large online presence with high traffic to your site. A much, much better option would be to choose something available or just add a number at the end of the word and then put a .com and then brand that as your online store. At least it's a dot com.