Sometimes the listing is obviously a scam, sometimes it is is just something that could be better: somebody is selling a box of assorted TTL ICs for $30 which were ill chosen for any use than testing your logic tester. (e.g. with $30 of quad-NANDs you can build a lot)
In the early 2000's I would avoid Staples to avoid crap brands like VTech and go online to seek out Plantronics instead. AMZN got a reputation as a fair dealer for things like HDMI cables compared to a place like Best Buy which might only stock a $99 monster cable.
Slowly AMZN got worse and I have less trust in the marketplace products than I did before,