Jon;
That is usually extremely good advice, However. I have seen the opposite happen. A good example there were two Lyman bullet molds of the same number listed on e-Bay at the same time. they were Hollow Base & both included the base plug. One appeared to be virtually un-used while the other looked as if it had cast many bullets. I put in the only bid on the "Best" one & bought it hor less than half of what the other sold for, with multiple bids.
Why? The only reason I can figure is the seller of the one I bought "Correctly" listed it as for the 1860 Cal .44 Colt Army model, while the other was listed for a .45 Colt SAA. No doubt many of those bidders simply looked at what the Seller Said it fit, & failed to see the two molds had the exact same bullet number.
I could tell from the seller's comments when he shipped it that he was highly disappointed it had received no more bids, but he did not in any way try to Weazel out of the deal. Mold # is 450229 with a weight of about 155 grains.