I have resold other items on ebay but wasn't planning on HDDs. I suppose if they were wiped and tested, no ones info would be compromised. I'd have to look into it some more. I've kind of been into computers for years - my first one was an 8088 with CGA graphics and a 30 Mb HDD. Things have definitely changed since then but I have always kind of stayed current with how things operate. I used to scrap copper when I was in the field as an electrician but now that I'm in the shop, I'm looking for an alternate. I've already got some good contacts in place so I will take the time to further those relationships and earn trust.
Thanks all for the input