Carolyn, the Kitsh market is near Nevski - mixed with the antique items
As for the Mausoleum of Georgi Dimitrov - it was destroyed just like the Berlin wall and many other (painful) symbols of the past...
My father had the exceptional opportunity to travel a lot abroad before 1989 because of his job and he remembers that every time he came back after a trip he spent weeks and weeks in depression caused by the mere comparison of what he saw in the other world  and what it was in his. And feeling doomed to spend all your life into this reality was not a good place to be. Also, I remember that after the changes he quit his peaceful expert/scientific job in an Institute and started doing his own thing. Just because finally he had the chance to CHOOSE for himself what to do with his life.
So I guess as a whole people don't find it funny and don't want to remember it even for the sake of making money out of it.
Also Kitsh is not everybody. Personally I am not much into it.