Jeg's was doing the racer discount for any racer with a NHRA or IHRA permanent number, no matter what the et. It's not a straight percent off, it depends on the item, but every little bit helps. I know that may not help you Felony, but others may not know about it.
I've found my machinist usually can be pretty competitive with Summit pricing on engine build stuff, he's pretty good at finding sources for things. I would guess Barry, Brent & Blair are as well. I always ask him first.
I've found it's often worthwhile to check multiple sources sometimes. Although most of the big guys are about the same price on popular fast selling things, I've found quite a spread in price sometimes on smaller or slower selling parts, and Summit isn't always the cheapest. Of course that takes more time for the buyer. You may even want to Google search a part number, I've found companies with a cheaper price sometimes that I had never heard about.
I used to work in the retail grocery business and I know manufacturers lower the cost to retailers periodically on items - those are usually the things you see on sale weekly at your grocery store - I would guess the same thing happens in the performance auto parts world and could explain the brief lower price you saw. Big companies have buyers that probably stock up on inventory at that time, individual machine shops probably don't always have time or personnel to monitor that stuff.