Sorry to hear about the situation.
I would particularly recommend flogging the ones that the brother-in-law 'claimed' first of all, rotten sod.
If you're selling less than three a week there's no need to ask permission, and even that seems a rather flexible rule these days. I say crack on, but there's only one Governer here so if you have a lot to offload in one go might be worth dropping him a line.
Good luck!