I've been a buyer/seller on eBay since 1998. I had a store on there for nearly ten of those years. 100% feedback rating with almost 5,000 feedback...
eBay has locked my account once (when I hadn't sold anything in months). I had to verify identity and it was promptly unlocked
They've also added a monthly selling limitation of 200items/$5,000sales about a year ago for no apparent reason.
In the past 5 years, Paypal has temporarily suspended my account until I verified my identity, Twice. I had to fax utility bills and other bullshit to prove I was me, despite being a Paypal member since it launched. After fulfilling the request, it was lifted.
Honestly, I think their system just randomly audits accounts. I wouldn't take it personal if you weren't selling stuff you shouldn't have been. It's a royal PITA when it happens but you NEED to verify yourself when they request it.
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