For anything I actually intend to USE, and that won't be just a toy, I'm done trying to find dirt cheap something and fix it up or make it work. Rather spend more up front and get something in better shape from the get go. Whole lot less trouble.
I have zero need for a 79cc saw, but that's definitely on my toy list.
Home Depot used saws save 50% or more off a new saw. One of the most popular is the Makita 6421 for around $300, add a $200 79cc top end and you are $500 into a $800 pro 79cc saw. There is one on Denver fb marketplace for $200 right now. The 4300 which is a smaller saw runs about $200. I picked one up as third owner for $160. Was in good shape and runs well.
I have zero need for a 79cc saw, but that's definitely on my toy list.