I think it's nice of him to give you a reminder of why you are glad to be rid of him!!! I was actually grateful to my ex for being such a jerk in the last years of our marriage that when he finally left I was pretty much over it.
And yes, that was a d... move - he should have offered it back to you or given you the money from the sale. Lesson learned - no more being nice to the scorpion. (Although, to be fair, you didn't ask him for the money - I would have!)
You're definitely better off without him. This will keep you from having those moments of being envious of OW. Real prize she got!
