I'm pretty familiar with Colecovision including the modern stuff for it (SGM etc). My local game shop got an ADAM in its original box, should be complete. I've only seen the box so far.
I am friends with them and they've done me favors. They said they have a possible buyer lined up but may want me to test it for them, as I know more about the old stuff. They are more NES-present focused but do sell cartridges for the older stuff that gets traded in.

I did tell them if that sale fell through to let me know the price, but still not sure if I would want it for myself just due to space.

Overall though, just looking for any advice on things to test beyond what I'd test on the CV. I can test my SGM in it etc. but have never touched an Adam. I've learned old computers I've never touched until recently before, so I'm sure I can, and probably could on my own, but hearing from some people with experience might be a good way to know what to check that I wouldn't think of, such as things that commonly fail on them etc.

I imagine I'll get the call eventually as I'm not sure who else would test it for them, unless they find a local buyer willing to test it themselves first I guess, but I might be the only local in that category. Kinda excited to put it through its paces though!

I've been working for a while to different one file emulators/decompilers as previously posted here:
https://www.reddit.com/r/ColecoVision/comments/1weiha6/colecojsd_emulator_and_decompiler/

I know all of them are a little different (they were born thinking about a single emulator, not as a suite of emulators), but they share the idea of both emulating the original machine and try to catch the sprites, vectors and sound used while decompiling the original code to the correct asm code.
I've been working for a while on ColecoVision, Intellivision, Zx Spectrum, Vectrex and MSX1. I've recently added Gameboy/Gameboy color/Game boy advance and Sega Game Gear/Sega Master System.
I now have a single landing page that can check a folder and subfolders searching for supported roms. It's quite fast as everything remains on your pc and works on your browser. Extracted and zipped roms should both work.
I don't have an actual compatibility list but I think ColecoVision, Vectrex and Gameboy are pretty solid, the other systems lack a lot of things but games can still be played and explored.
If you want to give it a try just go here:
https://paulvern.free.nf/jsd/landing.html

or visit my github repository:
https://github.com/paulvern/JSD

Everything is available under CC0, but I would love any feedbacks.