Did some additional testing with my 1.3.0.x character and can happily report that after heavy purchases, multiple saves, loads, and closing of the game the trade table sustained me.
I would say there's a good chance this has been resolved.
The only real thing I noted was that the profits being marked was only working partially, but I would wager that has more to do with importing a character from a different build.
More testing in the near future to be 100% sure, but yes I would say this is no longer a bug.
Great job!