Perhaps, but the premise still stands -- all of their fleet is encumbered. They own nothing, therefore have nothing to sell at fire-sale pricing.
The 330 is in demand, and there aren't a lot of white-tails at the moment. If US collapses, the mortgage holders or lessors will simply take possession, and fly them to Europe or Asia where they'll be able to get a better return.
Regardless, I doubt AA will order anything without either an extension or a new agreement with the pilots.
Fellows this is a interesting debate but I think you forget that AA is getting ready to install winglets on the 767 that will decrease fuel consumption by at least 4 to 5%. I dont think any new aircraft to replace the 767 is in the plans until they order 787 or A350 because both of these aircraft will have similar advantages over the A330 that the A330 has over the 767 without winglets. Why trade one problem for another 3 years down the line.