Hard Drives from PC's for gold, palladium, tantalum & ruthenium bits

Modern Hard Drives have very small boards and might be best to sell as is, older hard drives have very good boards and worth scrapping out to sell boards or to recover PM's yourself.
I split them into two categories to save time as for me it's not worth scrapping out the newer drives, but older hard drives are awesome for gold, palladium, tantalum & ruthenium.
visit htpp://scrapmetalforum.com.au to talk about precious metal recovery from e-waste and electronics.