I have a friend who has the domain name (VietModels.com) for awhile and thinking of selling it. He asked me to ask around for him.

It's an undeveloped domain, so, what would you think the price is and why?

If he would to develope it, how much $$ do you think it would cost him b4 the site is functional/operate and generate traffic.

Thank you for your answer.... I am learning too.

Has he been asked by someone yet?
I would recommend you selling on the SEDO. That is right place for the domain names like that

dnScoop.com say $53 bux, but they base that mostly off traffic related details. That domain w/ traffic or some PR would certainly make it more valuable, considering it will probably be used for a porn related site. Sedo is really easy to use, I would list it there and see what kind of offers you receive. I wouldn't let that domain go for anything less than $200.00. Good Luck!

The domain is worth what ever some one will pay for it.

SEO Section best place for that

I suppose that you understand that you have quiote specific and regional directed domain name. I'm not sure if you can have much profit form it