Let me know thanks.

yes on the same server, one guy sells gem in AH, second player buys it, first player gets platinum

for this to be effective you need a x/5 star gem, 1 stars will only net the buyer about 800 plat profit while 2 stars will get you about 3000 plat? (correct me if I'm wrong)

yeah but only valuable gems worth alot if auction house. so how muc will it cost to buy a gems you can trade for 40k?

he asked about the method no one said it's 1:1