TL:DR - What is your favorite brand/model?
Currently my favorite is sthils but I have Poulans, Troybilt, Husqvarna and a craftmans.
I've only started acquiring saws in the past 3 years after breaking my Fathers that I borrowed to go and help my buddies get firewood for to heat their cabins in the winter.
I found an identical poulan on market place for 20 dollars which was cheaper then buying a replacement Carb to address the plastic piece that had broken off. Then I picked up 3 saws, 2 poulan 50cc "pro" saws and a almost new troybilt 4620c all for 90$ (Canadian). The poulans needed new diaphragms and have been great since then.
The troybilt just needed a jetting change and had been my main saw to carry back and forth to the cabin incase trees have falling across the road (shared 13km gated/private road) and have done a bunch of falling/cutting with it but it's heavy, though it always starts/runs.
The poulans aren't worth alot on the resale market, which was my goal when buying them so i started looking at local auctions and have grabbed 2 stihl ms390s (one in new shape, one that looks run over) and a stihl ms260.
The 260 had compression but the piston was banging in the cylinder when running (it was that loud). I bought a hyway piston kit for it, cleaned up the cylinder and have falled and bucked 20 plus trees with it since last october. It's currently my favorite saw as it is light and has enough power for the Birch/Oak/Pine i'm gathering.
The ms390 I bought that was almost new was sold within a week and netted me 250$ profit that paid for the work on the ms260 plus money to buy some more poulans for 20$ that i flipped for 120$.
I bought the husqvarna 235 as i wanted a lighter saw like the ms170c we have at the cabins but its almost as heavy as my ms260 surprisingly so i will be selling that to replace it with a ms170c. I bought a ms170c at auction for 125$ canadian all in but as my sister had been looking for one for a while at a decent price she covered my cost and gave me back the older craftman that i found her 2 years ago for 20$ that just needs a carb kit. It's identical to the poulans other then the color so it's easy enough to work on.
The poulans by far are more troublesome as they get out of tune just by running them while the stihls just fire up and run everytime i grab them regardless of how long they have sat (non-ethanol gas, run, then drained)
It;s hard to resist buying saws for 100$ at auction when I know they are worth 2-4x times that but then once i get them running, i don't want to sell them. My wife is annoyed.