If you love to work on saws and don't mind making little to no money. Then this is your gig. But don't expect to profit from it. Plus where you are located will have a big impact on how much business you get. I highly doubt a lot of people will ship a saw to be restored for premium prices. This website, and a couple of others are a very small portion of the chainsaw collecting in this world. This site is mixed with collectors, geeks, freaks, and guys that use their saws to make a living. We all love saws... but I wouldn't pay to have one restored. I'm sure there aren't many others on here that would either.
Even where I am at up here in the PNW... I doubt a "chainsaw restoration" business would profit. There are lots of big old cool dinosaur monster saws around here. But nobody wants them restored. There have been a couple of cats over the years that have gave it a shot. But they all eventually tossed in the towel. Just no profit in it.
Gary