...you're dealing with biases in perception based on data that's not grounded in research. That happens all the time. How do you think politicians work?
Q: How do I know if a price is negotiable?
A: Usually a seller will say if his price is an “Asking price” (open for negotiation) or if it’s “firm” (meaning that’s the final price). “OBO” means “or best offer”, meaning the seller is willing to sell the item for the closest offer to their original asking price.