@rorie: I dont think it is holding them, because the message I receive is "
Some of the items in your cart became unavailable during your checkout process."
What made me ask about a store error earlier was that the process allowed me to go all the way through PayPal and credit card info, only to kick me back to the first step and then say it was out of stock. Now it simply kicks me to Sold Out message, without first going to payment credentials.
Yeah same for me. Did anyone successfully get a poster with paypal?
Same thing happened to me too. I was able to get the poster into my cart, but when I tried to pay I got the same error. Then when I tried again, the item was sold out.