You should bid on them. Maybe you can win them back for less than what he paid for them.
I had a board member purchase a card from me a few weeks ago and turned around and immediately listed it on eBay. I didn't care because I felt it was his to do what he wanted with it since he bought it. However, the card ended up selling for about a 10% loss than what he paid for it (not incuding the eBay and PayPal fees he paid on top of that).