My ramblings...
MCM Electronics sells $20 spools now. Ships from Ohio. I haven't tried it personally, but others said that it was just as good as their other stuff.
I bought a promo spool from BotFeeder, and it printed better than what I was using before.
The rolls of filament that I have from SeeMeCNC say "Toner Plastics" on the sticker. Which is the same sticker that you can make out underneath the label that Inventables puts on their spools too
A company in Chicago that gave me a printer demo was attempting to come up with a turnkey printer with OEM slicer settings and all of that, and their claim was that PLA was almost always fine, but ABS tended to vary in quality and performance. I've never printed with PLA, so I can't speak to their claim.