[tbrooks]

FE International is known to broker a lot of SaaS company sales. I haven't sold/bought a business with them, but I have friends that have.

It's not a marketplace per se, but it might be what you're looking for.

[1] https://feinternational.com

[vram22]

Patric McKenzie (patio11 here) sold either or both of his businesses via FE Int'l - Bingo Card Creator and Appointment Reminder. IIRC he has written about both experiences on his site kalzumeus.com .

[vram22]

s/Patric/Patrick - was a typo.