RadioShack has a 12 hour 50% off flash sale today on a weird assortment of items, but it does include CR 123 A batteries at a very good price. Also lightning cables, a power brick, 3 different soldering irons, and a couple of other things. Oh, and a retro design cassette player, one of those ones you carry around by the handle, but that does have USB in for recording. Like I said, a weird assortment.
This is the “new“ RadioShack, basically an online warehouse operation. Their list prices tend to be noticeably higher than other outlets, but at 50% off, it’s a decent sale.