Photo: Courtesy Retailer Who cares about Black Friday, Thanksgiving, or Christmas? Worshipers at the altar of consumerism know the real excitement comes Amazon Prime Day. But as loyal Strategist readers know, just because a product appears on the master list of Prime discounts doesn’t mean that a) you’d actually want it, or b) that the new price is actually a good deal. Here, though, are a few on-sale gadgets and other things that I like that a) you might, too, and b) are actually good deals (based on my years of professional deal-seeking expertise, plus some Google searches). eero Home WiFi System $239 (was $299, now 20% off) Well, hey! This is the very mesh Wi-Fi system that I wrote about for this site (and that I own), complaining only about the steep-ish price. Not anymore! The basic set (one base station, one satellite) is now half-price. For bigger houses, the three-base-station set is $300 instead of $500. If you have dead spots, snap it up! $239 at Amazon Buy Sony Wireless Bluetooth Noise Canceling Over the Ear Headphones with Alexa Voice Control $128 (was $198, now 35% off) These aren’t the top-of-the-line $300 babies I reviewed here, but they’re a…