Dunno. I got all the way to the page where it wanted payment info and it was still afu. I'm glad I noticed. So I went back, rearranged the order in which they went into the shopping cart (exact same items), and it was back to $3. Probably something I should have told them about, but they went out of their way twice to fix post office issues for me, so I didn't want to be "that guy". I assume that they would want try to fix it, though. Their shipping rates aren't listed anywhere, so I'm not sure. If I pulled one over on them by getting shipping too cheap, that wasn't my intent. But what it listed at the time was $13.something, which is out there for what I was ordering. Surely they notice on their invoices if anyone actually pays the higher price.
LF has been nothing but great, so not at all suggesting foul play, but even if they were intentionally trying to increase the shipping, I would imagine that the shopping cart abandonment for first timers would make them click the back button.