Have used it quite a bit for older console games, but I think they do PC as well. There is a whirlpool thread where you can get feedback pretty quickly from staff if you have questions. Shipping takes a while though so it's not great for a wants it now type of purchase.
edit: should add that despite the name of the site, they are based in the UK. Some games may have region lock issues with DLC for consoles, usually its listed on the site or you can ask in the thread or whatever.
edit 2: Shogun 2 limited edition AU$36.99 . Would probably take 7-10 days to arrive though (had a few games take more like 14-20, but not sure if they were in stock at time of purchase)
- Wookiee Tailor & Dark Jedi || DAoC
- Merc CoH
- Scrapper || CoV
- Ninja MMEQ2
- Jeweler || GW
Wa/Me & Mo/Ne WoW
- Warlock/Jeweller || LotRO
- Marauder, Choppa