I'm not sure of that.How do offers work on Bonanza? I don't have any of my listings set up to accept offers, but someone just sent me a message asking if I'm flexible in price, and I clicked the Yes box in the reply. Does that make it so that buyer can now send me an offer? Can anyone else send one too? I kind of remember somewhere, and I can't remember if it was Bonanza, that if you accepted an offer, it included the postage. I want to make sure that isn't the case before I agree to an offer.
I have "negotiable" in my listings and if the buyer wants to make an offer, they put item into cart, click "view cart" and on the next page, in the lower right, there's a "make offer" button.
Keep in mind that offer prices are all-inclusive, meaning you can't add more for shipping so make sure you can afford the offer plus cover shipping.
They used to have a counteroffer button in offers but they don't have that any longer. There's just "accept" or "decline." When I decline, I include a note to the buyer telling why I declined and often let the buyer know what I can afford. I also specify that my offer price includes shipping.
If you want to make your item price negotiable, go in to edit the listing and scroll down to the price. Tick the box to make the price negotiable.
ETA: After a buyer expresses interest, there might be an option to send them an invoice in whcih you can put your agreed upon price. (I've never done that so I'm not certain how it works.)