That's pretty much the situation I am in with my current stable. The bikes have enough miles to make them non-competitive on Craigslist and the trade in value the dealers offer is a fraction of what I would take for them. My bikes have a higher insurance value than any other value. Of course that means I will never have a bike stolen which is OK by me, but it does take the worry out of travelling with the bikes.
I am now rearranging my garage to fit more bikes since I don't want to take the loss on selling the current ones.