[mango]

these guys are pretty good, they have market research solutions that you can ask people about your product/business/idea and get results if its worth even doing, so far i think they are the best/cheapest in that department,
they charge like 60 dollars per question with 50 people answering the survey. i tried them there pretty good. i dont really bother with the domain name products they have, but you can use their service for any market research question,

http://www.dollarmuch.com

if anybody else knows any other cheaper company greatly appreciate it if you could post it

oh also i just read on heir website that if you list your domain name on their site and if it doesnt sell within 90 days, they will buy it from u or something..
i dunno im not a domain guys, maybe for domain resellers..