that is a very cool machine. among the easiest bikes to sell in my opinion. try e-bay and see what activity you generate. I would place a reserve that you can reconcile and put it up for 10 days. you may be surprised at the result. alternatively, consider having pro italia consign the bike. they will get all the money and manage the process. it will cost you 5 percent for the trouble.
I have 3 bikes left. I think of selling at times but they take up little space and I would miss them if they were gone
I don't know what your collection looks like but the smart is a very cool vintage bike with some chops! you may want to keep that one
best,
pcb