Hello Daniel,
Thank you for contacting Name.com. I apologize for the issues you have been having placing your order. Unfortunately, I show that for some reason, the transaction is not being allowed through by Paypal. At this time, your options are to purchase the domain with either a credit or debit card, or contact Paypal and find out why they are not allowing the purchase to go through and fix whatever issue they are having with the transactions.
If you need any further help, please don't hesitate to contact us and thank you for choosing Name.com!