I sold a Wal about 20 years ago, and another about 8 years ago. I shouldn't have done that. I kick myself when I see the prices they are fetching these days!!
My only real regret, I sold a Mike Lull Jazz bass. I was running a one-in one-out policy at the time and now wish I'd kept it.
Everything else was nice to own and play but was replaced by something better, so no tears.