Huh? Market value is market value. The prospective owners aren't in cahoots with the current owners and the league, they'll bid what they think is the right price. I don't see how one owner's offhand comments on valuation could possibly have any significance in that context. Great, so Sterling might want to use it. So what? He can use the Dodgers' sale price if he wants. Doesn't make it relevant.
Market value - in an arms length transaction - assumes a willing buyer and a willing seller. Sterling is not a willing seller. So if he is forced to sell the franchise for what he perceives is less than market value, he will sue the NBA and owners, for depriving him of the market value of his franchise.
If the NBA approves the sale at $1billion, and Sterling believes the franchise was worth $1.5 billion, he will sue to recover the difference in value. He may not win, but lots of litigants file suits they don't/can't win.
As to Scooby's point, seems to me he only has to allege that the Commssioner's approval was not reasonable - not a particularly high standard to have to avoid a MSJ.
the owners will take the position above - that the prospective buyers were competing against each other, and thus any offer is reasonable and representative of market value - but it is by no means the only side to the argument.