I suspect that every club, just like every player is always for sale at the right price. You dont need to stick the place on right move to be visible. Mel tried that and it was disastrous.
I'm not sure we have any Derby born billionaires, so the best you can hope for is an investor looking to buy "A" football and they'll be making their decision based on costs, debt, league position, fanbase, assets etc.
I'm not sure most big investors would go for league one clubs, the risk is too high. But championship clubs with a shot at premier money, they seem to be worth a roll of the dice