I can find most of the items I'm after on the 'Bay. I may have to search for a couple of months to find the grade/price ratio I'm comfortable with, but what the heck, I've got time. Besides, that slows down my outlay over time so that I can put food in our mouths and pay the rent.
If I did bid at AHs, I would certainly take the BP into account. If I remembered to.