I think it’s more likely he’s trying to go for a larger than valuation offer to pay off his gambling debts and some more than some sinister scheme for housing. Why bother trying to sell if that’s his goal?
The offer made by the consortium is indicated to suit Begbies, which means it should be good enough for a sale (if true), but not for someone who might want to gamble for a bit more to help himself out of a situation where he owes millions.