I have two thoughts. I have bought cables and power cords from manufacturers for the same price as they went for on recently closed auctions. If i like the price I contact them and ask if I can buy one at that price. It has worked alamost every time I have tried it.
On auctions I find myself getting emotional if I start bidding too early and more than once I have bid more than I had promised myself than I would as I find myself really wanting the item and the hype gets to me. This is one reason I try to limit myself to auctions that have little more than an hour or two remaining.