Yeh thats what I figured, I just own single climbers and a few stationary singles. Didnt know if people had a preference for a certain brand etc... Going to take my kid this year, probably be scaring off more deer and bear than anything but gotta get them involved at some point!
I can't give you any specific models but there are usually 2 man ladder stands on Craigs list in the $100 range. I bought one new in the box for $80 a couple of months back. It goes up Saturday for my 6 year old and I to hunt from this year.
Good luck. I have one by Field and Stream that is decent. I think it is important to have both the platform and cage meet the tree (2 points) for stability.