Could we have a custom market for highly-priced items (specifically MVP Cards) that could hold up to 30b value of items (if there's such that exists).
Basically, there would be an NPC to trade your Zeny for Diamonds (similar to 17C Diamonds) that has a value of 1m each, and 970k each when you re-convert it back to Zeny, to simulate the 3% vend tax.
Vendors would put up prices in this market as if 1 Zeny (1 Diamond) = 1m Zeny, so if I want to put up an item for 5b, it would mark as 5,000 Zeny, but it won't accept Zeny, only the special Diamonds from the Luxury Market.
