A dealer has a couple of conflicts of interest. If you are scrapping parts off of the saw, or returning a saw to service, that could mean fewer parts or fewer saws for him to sell. Could also be some liability problems, or violate a dealer agreement, if he sold you saws that were defective in some manner.
If you have a good relationship with a dealer, you might set up an arrangement to be his 'scrap metal vendor'. Offer to pay him a scrap price for all of his junk that you will recycle, versus him paying to have them hauled away. Promise to buy any repair parts you need for the saws from him instead of a catalog.
That way, he will have some financial gain to offset lost parts sales, and allow him to keep any dealer agreements he may be committed to.
Just a thought.
Philbert