@BobL - Are you saying you have never milled with a new saw(or freshly broken in), ever?
@TimberTramp420 - Thirty-five inch wood is fairly large, but it's only part of the equation....length of cut is just as important. That width, but 24 inches in length is a 'burp', but 11 feet....not so much. Recently made a cut in 33 tapering to 36 over the length of 11 foot 4 inches....it took 1-1/2 tank fuel, 2 tanks of bar oil and 23 minutes. I moved that chunk to the bandsaw mill and cut 2"x6"x11' - 10 of them(plus some 1" boards) using only 1 pint of fuel(sorry, no oil) and it took less than 12 minutes(but I had to move the pieces between cuts).
Of course, the efficiency of a bandsaw mill is always going to win when it comes to kerf thickness, and fuel being used. But it can only do that if the timber can be taken to the bandsaw! Time, probably going to go towards a bandsaw mill too....typically it's all about horsepower. Unless your chainsaw has 25HP happening!
Buying new has advantages....
#1: You don't have to worry about some turd selling you a $650 used saw that was used once(of course it was used one time for three days straight milling 'something' in Australia, in prehistoric rock formations, during the summer, with no oil).
#2: You can break in the saw, know every little thing about it, and it becomes your 'child' to be cared for.
#3: Well, everyone deserves a new saw!
Scott (screw used crap - BTDT) B