I note The Bat Pro is on BDJ today, with a 50% discount.
It's sad, really: it's a really decent, capable, configurable email client that I've loved for years -- until it (or rather, Voyager) ate my email archives, proved immediately afterwards that its backups weren't anything of the sort, and immediately after that their support wasn't worthy of the name. I went to Thunderbird too.
I still miss The Bat -- but not enough that I'm prepared to trust it with valuable data again.