Upstate NY
For where I currently reside I use Parkside Supply in Wilmington, NY. Great little shop, basically a two man operation. Fair, honest and take care of their customers. Stihl, Husky & Echo dealer, also logging supplies and lawn & garden stuff.
When I used to live & work in Central NY I used primarily House Trucking in Central Square, NY. Another fine, well established family run business. Serviced pretty much any/every tree care, utility company & logger in the area. As I recall (from 10 yrs ago) dealer for Stihl, Husky & Jreds, maybe more can't recall exactly. Would work on anything for good customers in the great shop, their techs were awsome at what they did. Pulled my bacon out of the fire more than once. Had HUGE supply of old parts, if you needed something for an old, out dated saw no problem. Go search through the apple crates and you'll probably find what you needed. Because they serviced primarily professionals they were excellent at getting you back to work with quality tools to make chips/money. They've been in the business a long time, used to love looking at some of the old hardware lying around in addition to the shiny new stuff.
One more shout out to Gary's Small Engine in Clay, NY. Great guy, was just expanding into Stihls as I left CNY, but knowing his work ethic and how he supplied/serviced his other product lines I'm sure his shop is top notch today.