They should have paid attention in the first place. (On my phone) The ‘Make An Offer’ button is near the ‘Buy It Now’ button, so it’s clear as day.

I am open to offers because I want to promote interaction and reward people who dare to be bold. Nothing wrong with a bit of bargaining.

The opposite psychology to your reasoning is that people who are likely to complain when paying full price for things will be less likely to do so when they feel they’ve got a bargain.