Tons of accs got toasted previous week. It seems that they decided to purge the most annoying ones. All of my accs survived, and one of them even got re-instated (after a decent work, though).
Not seeing any unusual activity on paypal's side when it comes to any of my accounts. No limitations or anything.
OP might have gotten linked somehow.
Also, a new account being limited for buying is nothing new. Several threads discuss that topic.