No, no and no. .com or bust is my motto, but there are some worthy .net and .org domains. Anything else is not a good investment if you ask me. People always want .com and will always want.com
Escrow.com is the clear choice for selling websites and domains. I have only had good experience with them. If you don't use an escrow service you run a high risk of losing your domain, website and/or money.