There isn't any good RMT site.. Most RMT site is own by afew companys..
ie. you might see like 10 sites.. but its all the same people behind the sence, they are there to Take your money frist,then "IF" they can deliver they will, if they can't they won't and they will pretty much shut that site down and make a new one and start all over again.
Most if not all RMT site is from asian countrys
cost of make a website = $3USD or less ..
cost of taking your money and everyone else before the site goes down = priceless
If you are using Paypal, They won't help you because they won't deal with "Visual goods"
the best thing to do is call your credit card company and get your card frozen or say your kid brother stole the card or something like that.