I have what I believe is an 80s Fleet in my 2009 Tacoma Access cab. It does fit. However I have no idea what someone did before hand so I guess it could have been narrowed, but I truly don't think it was.
The one thing I had to do to get it to fit my truck is but a couple of runners of wood between the bed and the camper floor. Before this the wings of the camper sat on the truck bed rails which is a bad idea.
I too have just the two jacks. It is a pretty sketchy situations when the camper is sitting just on the two jacks before you get the truck under there, but it works. Make sure you get the jacks symmetrical when using them. And also, on the side with the windows be sure you guide the jacks as they get weighted so you don't mess with the window framing.
So far I'm loving mine in my tacoma.
If its in good condition, specially water tight roof, solid lifting panels, decent canvas. I'd say 850 is a solid deal. I got mine for substantially lower with two jacks, but have since done quite a bit of work and money.