The thing is with chainsaws it is cheaper to replace them than repair them usually, you can pick up a reasonable quality one for a couple of hundred dollars, use it till it gives trouble and then just replace it. Mower shops simply can't do much work on them for that sort of money.
I usually repair them at near cost if it is carburetor problems; otherwise, most of the low end saws are like you said just as cheap to replace. Here I do 2 cycle handhelds as a curiosity repair that generally bring in more profitable repairs.
If I didn't do these as near cost many good items would simply be tossed because of need for a carburetor repair or fuel lines. Now I got a craftsman blower in the shop that I am killing off due replacement vs repair cost. It got a nice 120 psi compression but the cylinder is heavily scored and to repair would take several hours short blocking when even charging one of labor plus parts is as much as a new $99 unit.
Now one of personal costs over 450 usd if I was try to replace it so it will get rebuilt when the time comes but those 130 usd saws is different story. The last nice one that repair cost nearly 100 usd just in parts to just replace the PNC but it was worth to me since it is now my saw.
