Hi audiopus,
First of all,thx for bringing the service to malaysia.though you charging extra high to compensate for your time and energy in getting the cards isnt wrong, but there are others like you mentioned arj and werez that charge strictly on conversion rate. So being the business man that you are,im sure you realise that for now, ppl would only choose you when they absolutely need to. As in you'd most probably be receiving orders when there arent any cards sold by other sellers.
There's not just arj and werez that sell the cards here,there are a few other ppl too who include jap cards and euro cards in their sales and they charge by conversion rate.As i said, business is all about profits,i dont know how these guys get it cheap but as a buyer,the only concern on our midns is to get it cheap.
so the difference in payment is as follows.
Your price :
USD10 = RM40
USD20 = RM80
USD50 = RM200
Other lyn seller's price :
USD10 = RM34 (difference in rm 6)
USD20 = RM68 (difference in rm 12)
USD50 = RM170 ( difference in rm 30)
Im a financial analyst and im just analysing your business plan here.I dont mean to make you a target of any kind and as you can see from what i've written,there arent any hostility (or there shoudlnt be) towards what it is your trying to do here.

All in all,i wish you the best of luck in your business endeavour.Perhaps you could collect orders for games and packs only exclusive to shops in america when you come back home next time.