OK, firstly it's not difficult to get access to genuine wholesale prices, you just need a tax id as proof of you being a legitimate trader, but that of course means running it has a business.
Let me know if you have not yet received your bonus offer and I'll get one of the customer support team to chase that up for you no problems at all.
In regards to Liquidation.com, you'll find quite a lot written about them in the forum, just enter liquidation.com onto the search interface and read away. Basically you are dealing with independent sellers there, not so much with one company.
It's very much a mixed bag, you can get some great deals, some real garbage and a mixture of both, so you need to focus your research on the actual seller who you are interested in.
We have a supplier of NTSC games on the forum called GH Games, they are based in Singapore. Only just talking with them yesterday, so I'll get them to contact you and see if they can be of some assistance.