I have this dream where I bought 280 Lancelots from Ngzhang instead, and traded them in for the same number of Avalons...
Sometimes you pick the right horse, and other times you don't.
Hum, don't feel down. The trade-in still isn't possible.
Ans as long as the boards are generating income, it may be safer to buy Avalon full price and wait for them mining with something that still is quite profitable.