It depends on the bed... (A long story)
Like a bass clarinet pitched in A, a bass sax is a nice thing to have...if you have the chops, the space and the bux. As those who have known me for a while, I once had an option to purchase a fully functioning Conn bass sax for the grand total of $600 (in real, US of A, money). (Its a relatively long story, even if it is interesting.)
I thought about it for a while and then opted instead to buy a sailboat instead. I dare say that I got far more utility out of the boat than I ever would out of the horn. Your mileage may vary, of course.
They do seem fascinating if you've never played one before. For that matter, the same could be said of a baritone when seen through the eyes of a non-baritone player. However, at the end of the day, those so fascinated get to go home, unencumbered by either the physical or the fiscal burdens of owning one.
They do look impressive, though, especially when they are new and shiny.
