This is what I had seen: Some item categories are monitored more closely for fraudulent activity. In order to bid on reward points and code items, you must verify either your credit/debit card/bank account information or your phone number. You can verify your active credit/debit card or bank account by making a $1 purchase. We use Paypal to process the transaction, but you don't need a Paypal account to complete verification. Note that transactions for credit card/bank account verification are non-refundable. Don't know if this might be why or not. Perhaps it has to do with being new to Listia? I'm going to file question to a support ticket. It might take a little while for them to respond. But I'll pm you with their reply. So sorry that you can't bid on something you want.
Let me check the "rules" per Listia. I think I read something about you have to have seller's wings before you can bid on GC's and a few other things. I'll get back to you shortly with info.