Here's a small 486 haul. Grabbed these for $30, all of them sold as is, unconfirmed to work, so it will be fun to see if they all work.

Octek Hippo VL+ DCA Motherboard
This one had a leaking battery which I removed. The battery had caused a lot of surface corrosion, I rubbed most of that away with vinegar then soap, it doesn't look as good as new but it does look like it shouldn't have problems.
There was, however another issue. This board was probably not well stored, so when I checked the chipset ICs (a habit I have from checking 3dfx cards) I saw that some legs had been mashed together into contact. I carefully parted these with a sharp modelling knife, and it looks like they are still soldered to the PCB and unsevered.

The board came with this CPU:

Intel 486 DX2-66 Overdrive
As well as 8MB 30-pin RAM but I can not know whether it's EDRAM or just normal SIMMs, they are labelled ZMD MM 108-60 on the back, no referenca to EDRAM anywhere, so likely regular SIMMs.
I also bought this CPU because why not, I love UMC.

UMC U5S-SUPER33
And the seller was kind enough to add this to the lot:

AMD Am486 DX2-66
As well as a User's Manual for one Wearness BusinessStation 386/486 PC, which will be my toilet/bedtime reading for some time 😊