It would be much more profitable to an end user if it was smokingsite.com -- Not many people like to use "slang". Smokin is considered slang to an end user promoting a business.
Still could rank high in search engines for smoking.. Could be a great idea for a smoke shop, seeing that there are 100's opening every year.
Estimate: $100 undeveloped, $200-300 developed with a store/dropshipper.