All the teams looking for buyers are going to have a tough time selling until MLB finalizes what local TV and the CBA is going to look like in a couple years. Cable/RSN models look to be essentially dead by then. If $20/month apps are the replacement, it is going to look very ugly from a revenue and exposure basis. If they can improve the CBA and get all the teams to buy in on a national streaming deal, then the future is looking a lot brighter to a potential investor.
Of course, there could always be a passionate billionaire fan who really wants to be an owner who is willing to overpay.