We get "how much if I buy all of your stock of XYZ?".

Sometimes it's only half a dozen cheap lots, not a large amount. We reply with the total price, but with a postage discount. Only to get told that's too much.

We don't mind giving a discount when someone buys a large number of lots which can total over $100, but we generally list at the minimum we're prepared to accept & don't have "make an offer" on any of our listings.

We're not desperate - if they don't want it at our price, we can wait for someone who does.