Cool Ebay feature

Ok- this was new to me- but i was looking for some books that are out of print on ebay and came across a feature that says ‘make me an offer.’ I paid $2 (plus 4 shipping) for a book that was listed for $10. they can say ‘no’ or make a counter offer. I gave another offer for $5 on a $35 book- didn’t get that one LOL! but I lots of times forget to sign in for books that i want…. and this is a great way to get something..maybe..cheaper. You all probably already know about thsi but it was new to me so thought i’d mention it. Also as a way of buying books- i just put the book in google vs. checking ebay first. I got one significantly cheaper than on ebay from a random used book shop that way.