SKill 77 is an old reliable, powerful, very heavy saw. I used one for near 20 years everyday. These days my hands and wrists are just to weak to use it. The newer lighter tools are near as powerful and far more elegant so I have graduated to those, even for framing and site work. For brute strength, framing, general home building, etc that Skill saw will remain a classic and will be used by tradesmen for many more years to come.
Just make sure the base isn't bent or twisted, those tend to get tossed around a lot. The base getting knocked out of whack was the only issue I ever had with the several I have owned over the years.