About the SC-7 I bought from a couple of pages back: Sounds exactly like my SC-55 in games, so no need to upload a comparison. Still cool though.
Two new sets of purchases since then.
Ultimate Doom, Windows XP Pro Upgrade, G-Nome big boxes (all with full contents), Windows 95 sealed OEM, a bunch of floppies and a few ZIP disks. Total price, $20 AUD. A garage sale that actually paid off. Unheard of around here. Worth it for the Doom copy alone.
Floppies were a mix of driver floppies from Microsoft (Sidewinder and a mouse off the top of my head), Logitech, and just standard blanks that had their crap on it from two decades ago.

Also bought an SC-88ST from Gumtree. Two reasons interested me - I didn't have an SC-88 in any form, and this one was white and not black. It needs some TLC cosmetically but it works just fine.



Early or late model? I have no idea. Will require some more investigation. 🤣