They came back with $3500 and 23.99% APR. I declined. There is, unfortunately, no "Decline with derisive laughter" button.
Then I called MBNA to see if they'd bump up the limit on my card, which would have the same effect (and only 9.97%). The appropriate department is, of course, closed. Stupid holidays.
I actually have /almost/ enough space on the card to buy the thing, and could clear up enough space pretty easily. The only reason I've been carrying the balance there is 'cause I was focusing on paying off the joint debts first. However, I worked out - in my little spreadsheet I'm using to track the joint debts - that we've got enough on-hand to pay off everything we need to pay off. All that would be left is the gazebo - which we haven't ordered yet so we don't owe anything - and the windows - which are financed for 10 years at about $63/mo, so we can wait and pay them off whenever we want.