For those asking for a ballpark figure, I would have to say in the low 4-digits.
There was a lot of work put in to coding everything as well as some uniques ideas/aspects.
As well the code is ultra-modular, you could set it up on as many different domains as you like, and simply edit the few templates to get full different looking TGPs.
Plus there is a database of established trades and what not. Really all you have to do is maintain the updating of it, say by loading in galleries once a week, and feed it traffic and it should be up and running again. Then remove bad trades, add new ones, that kind of work.
I know everyone values a site on what it's currently making, but I can tell you it was doing a few sales a day back when I bought some cheap feeder traffic for it (check back in earlier months in awstats you will see the traffic). It would be easy for someone with a bit of time on their hands to make profit from it.
