what to do with faulty hard drives?

[ChaosLegionnaire]

i have several dead/bricked (not detected, doesnt show up or making constant clicks of death) and faulty bad sector hard drives. im moving house soon and need to get rid of some dead weight.

i thought of selling them for parts or not working but they are quite heavy and shipping each drive internationally via local post is US$23 each. im using some of the drives as gym strength training dumbells by putting 4 of them in a box to make a 3kg dumbell. but since im moving i cant carry the deadweight with me. any ideas what to do with them that is cost-effective for ppl like me who are budget conscious? if there arent any ideas im afraid the most cost effective way for me to deal with the drives will be to send them off for scrap at the e-waste recycling box in my neighbourhood....