Sonic Electronix has a “Make Offer” option on some headphones

I don’t know if this is a new feature, or I just now noticed it, but Sonix Electronix has an option on some headphones (a subset of their inventory) where you can make an offer on a product by entering your preferred price in a box. Here’s a screenshot of how it looks when you press the yellow “Make Offer” button on one of the Westone IEMs: