Hmm, the obvious answer is, as you have already said, keep them both. However, something must have driven to put them up for sale, what was that? Once you highlight what it is that made to decide to out them, does this still stand and is something that will always be a niggle? If yes, back on the FS pile. If no, but keeping both isn’t really an option, which one will niggle the least? Once you’ve done that, keep the less problematic one. Conversely, stick with your original plan to sell both and wait for the seller’s regret .