Question #1: What is to stop you from keeping a very expensive game and never sending it back?
For example, someone sends you sealed mint chrono trigger NTSC.
It would be well worth it to shut down the entire site and keep it forever.
for the price (~770 EUR) that you get, you would need to do about 56 appraisals to make that much money!!!
Of course, I am not suggesting that you guys are criminals, but I want to ask, would YOU send your most precious game away to be graded and not have any way of getting it back IF someone decide to keep it?
Question #2: Why would a grading from you specifically mean anything? Do you guys have some kind of official tiitle or education? What is to stop everyone from buying there own plastic cases, ordering their own holographic stickers, starting their own website and giving themself a grading of 100% for every game they have? Do you have any more credentials than they do? Are you guys any more of an "official game grader" than everyone else?
Again, I'm not saying this to you guys as an insult or to try and make business bad, I am just asking questions to you that ANY serious potential customer would ask themselves before they send their precious items to you for grading.
I think it would do you a world of GOOD if you posted such questions on your FAQ too, along with maybe some kind of proof that this is 100% legit (like a testimonial from a happy customer, or post average prices of games WITH a high grading from you vs. those without).
I wish you the best of luck on your business!