The posted board is a poor choice for breaking down. The value and weight are one and the same. Copper incased in iron and/or steel.
I’ve played with weight reductions and this is a board I’d sell locally. As #3 electrical. Basically a copper recover shred value.
The smaller photo. The back is the value. Normally these are nickel or tin plated copper slabs. Use is almost always consistent on a board so I use a cheap knife or screwdriver to etch one. On occasion you will find solid silver or nickel backs. If one is copper plate they all are. If one is silver they all are. You won’t find silver on any thing modern other than very high end equipment that is worth more as a doa board than high telco scrap to online buyers
The only time I’ve seen gold was gold plated copper, on boards that cost over $1000 new. “Look at me” equipment. EVGA, Gigabyte, ASR, and ROG stuff. The same places you find gold cap canister capacitors, gold pin mounts, etc etc. i have a gold plated fan cage from an EVGA power supply. It’s bling. lol
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