Just letting you all know that copper heatsinks have a much better resale value than scrap value. People are looking for these for better cooling over the stock aluminum heatsink/fan combos. I dont think the pure aluminum ones are worth reselling. But the copper ones do quite well on ebay even though they are used.
copper passive server heat-sinks $10-$15
copper/aluminum heat-sink/fan combos $10-15
copper heat-pipe. aluminum fins with fan $10-20
copper heat-pipe with copper fins with fan $20-40
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