Very cool atmosphere and interesting idea! Admittedly, felt a bit lost. I would sometimes record a loss when I'm sure I should have made a profit. The number on the clock also confused me a bit, like trying to figure out the prices between the main ones marked out made my brain melt a bit, haha.
Would also be cool to see somewhere on the UI how much the entry fee for a round is (not just the quick pop at start of round), so you can kind of keep track of what you need to cover beyond the item's profit margin.
And think it feels a bit like a guessing game / gambling game, would be nice to have some like info or something to see how the much the AI wants the given product. But did read through your Dev Log and sounded like that was the eventual idea.
I can definitely see what you were going for here, and really dig it! I think with a bit more fleshing out and seeing what other mechanics could be introduced to keep things interesting, this could end up with an addictive loop!
I felt really cozy and ready to get settled into this bidding war, which is great start! Think I would have mainly liked a bit more strategy required :)