I would think they are obliged to sell all seized assets by government auction. At least, that's how it works in Canada. Isn't it the same in the US?
By government auction do you mean to the general public via setting up an online exchange sort of? Or selling it to banks or investment firms on wallstreet?
it will be the same as selling Madoff's shoes and furniture or stolen cars
there will be auction and everybody can participate. however they can decide to sell it by thousands or something and I think not many people like me or you are eager to buy thousand btc for this price.