Sold!
Old house closed today.
My old mortgage is paid off. My bridge loan is paid off. And I have deposited money in the bank.
In a comedic ending that would never play in fiction, I managed to lose the set of house keys that I have been using for twenty years as I was on my way to turn them over to the realtor (no, seriously, like, lost). Fortunately this was not the only set of keys to the house (also, fortunately--although I suspect that they are either at work, at my new house or in the landfill, in which case it doesn't matter--they have no identifiers on them at all so no one would ever be able to tell that they were house keys let alone what house they go to).
But that aside, it is done. And once again, I own just the one house. Woo-freakin'-hoo! :-)