WH, I am in agreement w/Bea 100%. If your h doesn't have money to repay you now or to agree to repaying you in writing, then how does he have the funds to take you back to court? How does he have funds to do what he does at all?
As for the Craigslist item, cancel the order, send it back or sell it. Also, he could call his credit card company and stop payment on it and advise them his son ordered it w/o his knowledge. It's a no brainer for a rational thinking person.
I'm sorry, but I don't buy into the pity party he's serving up and I seriously doubt that he's trying to refinance the home. I think it's all a bunch of bunk.
It most definitely is his problem to figure out and not yours. So, sit back and allow him to squirm. If he gets by on this one issue, he'll do it on others. Time for the boy to man up and do the right thing.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.