I receive about ten differenet catalogs each month for gun, camping, and hunting stuff. Each month I see a bewildering array of crap for sale that one wonders... why would anyone buy that crap?
One of them is selling a certain brand of scope, dirt cheap with no warranty and no returns.  Sounds like a greattttt deal.  If it has no warranty and no returns, it's going to be a beauty of a waste of money. 
Another one I have questions of are some of Aimpoint's very high end dot/holoscopes scopes.  They run to about 1500 bucks.  These scopes are basically no or very little magnification and project a variety of target "dots" onto a small screen that allow the shooter to leave both eyes open and target they, umm, target.  Most help to a range of 100 yars, maybe two hundred.  These high end Aimpoint scopes are night vision compatible and have some circuitry that will make one battery last like 5+ years.  That's a lot, considering I can get a similar product a few pages later for $40, minus the 5+ year battery life circuitry and night vision.  I can buy a LOT of batteries for the grand of cash saved.  Besides, why am getting a night compatible one when 1) I do not own night vision equipment, 2) would be unlikely to "mount" that night vision equipment if I heard a home intruder, 3) be in a normal predicament where I would need night vision sight capability, unless I was in the military.
Add to this stuff is a plethora of grips.  I never realized that everyone needs stag, fake mother-of-pearl, or fake ivory grips for every one of their guns.  The list of "junk" can continue for days of articles, but I have more to do today then continue this list.