I have tried to bid on 2 items from a seller I have never dealt with before and both times I received this error message.
Unfortunately, this seller has decided that you are not permitted to bid on their listings. You may contact the seller via the Ask Seller Questions feature if you want additional details.
Please note: You may not use other eBay accounts to bid on this seller's listings. Doing so may result in your indefinite suspension from eBay.