Not sure about your country, but here--for the cows---timing kinda matters. A few yrs ago, my buddy put an add out about now, on a bunch of bred heifers---he said hardly anybody called, and the ones that did were also sellers, wanting to compare prices. He was pretty bummed.
I told him I'd been in on both buying and selling, and it seems like everybody wants to get their calves gone, preg check, sell them, talk to the banker, plan for the winter, do some thinking---and got serious about thanksgiving. He later told me I was right, and that the phone rang off the hook. But---if you also want to promote the order buying, probably get at it on that part, anyhow.