Don't forget the "M"...Monoprice.
Monoprice is very good. They've been the "insider's secret" for computer folk for many years - they were a great place back in the day to get, say, $5 HDMI cables when everyone else was only selling $60 Monster HDMI cables (nowadays Amazon is awash in cheap HDMI cables). Amazon's big advantage, now, is that (if you can identify legit sellers), you can have things arrive the day after tomorrow "for free" (if you've bought into Amazon Prime), whereas Monoprice has more traditional shipping. But Monoprice has tremendous variety, good return policies, and it's all direct from them, so there's no question of bad 3rd party sellers sneaking in, or glowing fake reviews. Speaking of reviews, that's Monoprice's other big win - any random cable is likely to have hundreds of reviews from very nerdy folks, some of whom may have already described whether the cable will work for the odd purpose you have in mind. Very comforting buying cables or converter boxes that have hundreds of reviews from users who have a clue (vs. some of the 1-star reviews on Amazon from people who are irate that the USB cable they bought won't connect their TV to their VCR). So, I don't use Monoprice as much any more unless I've got a bunch of cables/etc to order, but they are, indeed, good.Never tried them but have heard good things.
(Does anyone else have a habit of regularly clicking "no, this review wasn't helpful" on 1-star reviews where it's clear that either the buyer is unhappy that the item won't accomplish some unrelated function that was never mentioned/suggested in the item description, or they clearly had trouble with the shipping, or 3rd party seller, not the item itself?)