Paypal issues through Audiogon


For the second time recently, I purchased an item on Audiogon. When I try to complete the transaction thru Paypal I keep getting the following message "this transaction cannot be completed please return to the participating website & try again". The last time this happened, I requested that the seller send me a money request via Paypal which he did. I no sooner paid his $1,350 request and Papal took an additional $1,350 from my bank account . It took me approximately 5 business days before they reimbursed my account . Has anyone else encountered this issue.? I would like to pay the seller of the record I purchased today but if I pay via his mailed payment request I think there is a chance the double payment issue may happen again.
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I've had a few sales through audiogon recently and the PayPal link has been fine Afrikaans (no complaints from buyers), but the shipping has not worked at all. I had to use paypal's and fedex's sites for the shipping.  I wasted a lot of time with audiogon's check out system  . . . Which could and should be very convenient but it doesn't work.
 I’ve had a different issue of compatibility between audiogon and PayPal for over the past year and a half + now. My PayPal account is verified yet on Agon they say it is unverified  so I cannot offer payment via PayPal for any listings here. I’ve dealt with Agon customer service back then for many many emails, insisting that the problem is not on their end and it’s in my PayPal account. Ive talked to PayPal and they see no issues and have my account as verified and it shows me that on their website and when I call. I also have no PayPal issues with any other website. 
I had not used Audiogon for YEARS to buy or sell anything. So all my info needed to be updated, And I did so before buying this August, a $4K peamp, here. The sale went through Paypal, (which I also rarely use except to buy from eBay, typically for less than $200 a pop...) not a hitch. Though PayPal robocaller called me several times asking if it was genuine or fraud.
Recently, PayPal wouldn't let me use the credit card I have on file and use elsewhere with PP.  Only my bank balance, which was insufficient for the transaction.  Adding the credit card didn't work.

Called the seller, and we did it over the phone with my CC.  The unit is here and functioning, but now I have an item that I have "committed to buy" in my Audiogon cart that I can't delete.

Emailed Audiogon for proper resolution.  It shouldn't be this hard.