Good point about the pictures. It might seem to be no mystery, but some sellers just don't get it. Some other observations:

(1) One auction has a counter showing 1626 views; the other shows 565.

(2) One seller put the word "diesel" in the item title; the other did not. It helps to take advantage of the search function. Perhaps this is at least partially responsible for item (1) above.

(3) One seller uses "all caps" in the item description, in blue, no less, which just about makes my head 'splode...