Have a look here it will give y0u some stats on traffic,
The site is worth about 2000 but in maybe less and can be put together for about 1000 dollars and be a real deal.
I have severat internet sites non being of adult nature Last month did about 230,000 USD in E-com biz hard work and not something to get into unless you have lots of time.
Good luck to the buyer
http://www.alexa.com/data/details/tr...bargirls.co m