I dissected an old pc that has a MB that i have never seen before.
The finger cards are verry populated.
Could they fall into better grade's than LSMB and clean finger

All High Telecom without removing any socketed chips. Except the PCB with silver contacts. That board. Silver edge. High Peripheral grade. As a side note the 4th photo. Sure doesn't look like the board sockets are NOT gold plated. Now. If you want to systemactically depopulate IC chips. For grade. I can not offer comments on that process with any type of confidence. Though. I do recognize the seasoned escrappers know exactly how to do it.
Here to learn like everybody else.

Thankx Catwisker
I do value your opinion and yes you are correct the long connectors look to be silver. I don't depopulate other than CPU's that i send in for test and buy. still learning after several years.