I got the PPD to work, gods that is annoying (Canon) and their crappy driver support. .

No it doesn't appear to support TLS. We're going ahead with a connector and be done with it.

I used them years ago on color printers where ripping a job could take a long time on the weak built in print controller. It's probably been 10 years since I have touched one. Even then, I didn't use it for the scan stuff. The extra processing power was just need to rip print jobs, not for scanning.

@Dashrender said:

Where did you get your numbers from? The manufactures websites?

Most manufacturers post those numbers. You then combine them with the real world prices to see what the price per page works out to be, roughly. It is always a bit of a guessing game, though.