Thoughts from a buyer's perspective …
I love lots like this, but I'm also looking for a good buy ~ okay, I'm looking for a bargain
; ~, and as GeoffHa described it, I'm mostly in the "penny-a-stamp" market. Also, in 2019 when I was getting my accumulation more organized, needed binders, and wanting to fill in some areas, I purchased 7 used Harris Citation albums, 5 on eBay
and 2 at a stamp shop in Portland, OR. They contained a total of 38,554 stamps at an average price per stamp of .0113 cents.
With these additions to my accumulation, when I now look at a bulk lot of stamps I need to consider the probability of obtaining more duplicates to what I already have, especially if I can't visually "sort through the pile". Having a good idea of what's in the lot is important to me.
Some things that catch my eye, and may even nudge me from the "penny market" to the "nickel market" are:
Stamps laid out individually in rows, or on album pages, Lighthouse Vario or Grande pages, or stock book pages (even if the Lighthouse pages or stock book aren't included). This way I can see every stamp and develop an informed sense of how useful this lot would be to my collection, even assuming some duplication to what I have. I realize that this involves more work for the seller and they need to consider if this would be worthwhile.
If the stamps are going to be displayed as a bulk lot (as in the picture), spreading them out so more of the individual stamps are visible, and having them all face up is helpful to the prospective buyer. I don't have a good eye for looking at a pile and estimating how many stamps might be in the pile. I always appreciate a reasonably accurate count or estimate from the seller. If it is a mixed country lot it is nice if the description includes what countries are in the mix. If there are stamps of topical interest (I realize that this is a very broad area), that might be mentioned in the description. The lot's make up of postally used, CTO's, MH, MNH, BOB is all good information to have in the description and may persuade someone to take a closer look.
I am not assuming that you do this, but when a description says something like "the picture is representative of what you will receive", rather than the picture being what I would actually receive, while I appreciate that seller's honesty, that lot gets an immediate pass by.