I'd say 'Go for it.'
Several years ago I came into two firefighters' Quik Vent saws. They were 80cc Echoes with drop nosed bars, carbide chain, oversized starter handle, and extra umph from a bigger carb and "special" piston/cylinder work -- I did not look inside. They also had a big heavy foot to lever against a roof and reduce the risk of kickback. I heard that they fell out of favor when an electrolux-based saw (maybe the one you are looking at) with adjustable depth guide became popular, so my Echoes just sat on the shelf, professionally service twice a year and started once a week, just in case.
I removed the extra parts and put one on a small granberg ripping mill with a 36-inch bar. It works great.
I'm still trying to figure out what to do with the fancy bars and chains. They are nearly new, like the saws.
Don