Essentially what is happening is the value difference is being created by people who don't have paypal. (People who want memberships, but can't get one from the Account Page)
The average price before selling out was 125,000$, so we need to establish the benefit to those who are now buying a scarce, currently non-reproducible item.
If your only way to get membership is through in game currency, prices up to 500,000$ seem completely reasonable. (Coming from someone who has a membership, but no coins to sell)