So I noticed that Burson Audio was having a sale:
https://www.bursonaudio.com/shop/
But they have a flat shipping rate of $55 (at least on their amps).
So I went to
https://www.headphones.com/collections/burson-audio and put the same Burson product in my cart: free shipping.
But headphones.com's regular price was still more than the sale items on Burson's site, even with that site's steep flat shipping rate added to the total price.
So I thought, since headphones.com says they'll price match, why not ask if they will match the Burson site sale prices
and see if free shipping still applies.
I contacted headphones.com via email yesterday, and they haven't yet gotten back to me, but I saw tonight that many of their Burson products were reduced to the Burson site prices, including the one I wanted.
So I put that into my cart and yes, still free shipping (and no tax), making it cheaper in total than the same product on the official Burson site. Sold!
This is only the prices on headphones.com as of now, and for me a customer in the US.
tl;dr: Burson products on their official site
https://www.bursonaudio.com/shop/ are on sale, but their $55 flat shipping rate on their amps is pricey;
https://www.headphones.com/collections/burson-audio now has many of the Burson audio products on sale at the same price as the official Burson site, but with free shipping, making the total cost less.
(Excuse any lack of clarity here; it's late and I'm very tired: I actually woke up, thought I'd check my email to see if headphones.com had replied to my email...nope...ok, check the site: boom! prices reduced! better snag what I want before it's sold out!
).