squisher
THE CALM ONE!!!!
I do my part for the cause 

The price is built into the rental, and liability issues make it unwise to re-rent a used chain that may have been subjected to stress that might reduce it's strength. Also, chain sharpness is a big issue and too many customers would complain if they got a used chain with a half-assed sharpening job. For 98% of chainsaw users (and 99.9% of rental shop service techs), nothing is sharper than a new chain.
I don't think that I ever equal a new chain for sharpness. School me buddy.
Then I went and did a bid about a hour away up in the mountains and the guy not only booked the job with me but, he paid me, in advance, $1000.