I ordered a bunch of parts from Jason (DrJay) at SOP about 6 months ago and he was great. But lately I haven't been able to get a hold of him, not sure where he went. He'* in the military, so who knows. In his last email to me (we emailed back and forth every day for weeks discussing my project) he mentioned going away for a while. I asked him about his plans for the site and he said soon he was going to either shut it down or completely revamp it with many more products. Looks like he hasn't made up his mind yet. I wouldn't order anything from him until you get a response first.
When I did order from him, Jason was quick to answer my questions and very helpful. He even returned a product that I decided I wouldn't need with no restocking fee. He also sent me a bunch of different sizes of used supercharger pullies for me to use while tuning the new engine - for free. He even went out and used his "connections" of sorts to find me some parts from other companies; ones that he wouldn't make any money on, but I couldn't find myself.
As Wilwren mentioned, Jason doesn't sell anything you can't get somewhere else, and sometimes for cheaper. He takes a margin of profit for bringing it all together. Luckily, there are tons of experts here that will help you find whatever you need, just ask!