I’d be tempted to contact someone like made in Italy motorcycles to sell the bikes for you. I think he charges 10% but he’s got the right shop window and you don’t have to worry about time wasters or thieves coming to your place and insulting you with low offers.
It bears thinking about. I don't keep the bikes at my house, they're in a secure lock-up so anywhere they're viewed is not where they're stored. I don't have the room to keep them here or the needful security.