I just found this out and thought those who buy on EBay should know.
There is a limit to claims!!! This is on the EBay / PayPal policy page ( you have to look for it )
No More Than Three Claims Awarded Per Year.
Buyers are limited to receiving no more than three claim payouts per calendar year under Extended Buyer Protection. After a buyer reaches the award limit, he or she may file additional claims under PayPal's standard Buyer Complaint Process.
Recovery of funds, however, will not be guaranteed under the Buyer Complaint Process. Claim payout limits apply for both PayPal Buyer Protection claims and Extended Buyer Protection claims. For example, a payout for a Extended Buyer Protection claim and a payout for a PayPal Buyer Protection claim will both count toward the same award limit; if a claim were filed beyond the award limit for either a PayPal Buyer Protection eligible item or Extended Buyer Protection eligible item, this additional claim would fall under PayPal's standard Buyer Complaint Process.
So be aware – if you reach your claim limit, the 4th dud item you claim may NOT be honoured!