https://www.ebay.com/itm/283928480360
Didn’t want to post until I’d gotten mine and tested it out, but these are nice compostie video-only (no audio i/o at all, there was a separate audio-only version you’d need to track down and link if you needed both) 8x8 matrix switches with RS232 remote control (there’s a desktop control program but I haven’t tired it), chain mode (so you could, say, chain 5 of them and use them as a single RGBHV component switcher), and 14 memory locations. Only thing I wish they could do is mix multiple inputs to a single output (but they CAN mult a single input to an arbitrary number of outputs).
Really good if you do a lot of feedback, since you can save different complex feedback paths as presets and switch between them on the fly (and seamlessly if you use master sync).
Seller has them listed at $50 with free shipping but I made an offer for $35 and they took it, and when I’d confirmed it worked well I tried to lowball them even more on a second one since some of the button caps were missing on the one I got (still perfectly usable though) but $35 shipped is as low as they’ll go. Absolutely worth it for $35 and would be a solid price at $50.
There are at least a dozen left.