The response has been crazy! Before I consider selling I'm going to do some more homework, but it really has been overwhelming. Just to clear up the situation with the previous owner's, I don't feel any obligation to contact them because I actually paid for the contents to be left in the house. Without going into too much detail, the contents were going to be sold and due to the age and interesting history of the house I offered to buy them for a small sum in exchange for them not having to empty the house out (per the contract). But I've grown so attached to the house and its history, it would be hard to let these bikes go - it seems they're as old as the house!