I'm a great believer in reusing, repurposing or just plain using stuff others find outdated.
To that end, I often stop in at resale shops, Salvation Army stores and Goodwill stores. At these businesses, I am apt to find electronics still in very good, working condition.
In my home, we have 7 large flat screen TVs (one even in the barn workshop). Of which, only one was purchased at full price (at ALDI, of all places!). The others were purchased from one of the aforementioned resale type of shops or were being disposed of. None cost more than $44! Sure, some might be missing their remote (easily purchased on Amazon) and some might be a little scratched, but they all work just fine. All are connected to an internet streaming device as well as an air antenna. The antenna by the way is the old type that was used in the days of analog - works fine for digital broadcasts.
I've seen other electronics like stereos, VHS, CD and DVD players donated and for sale for anywhere between $5 to $15. Nearby are the VHS tapes, CDs and DVDs, all for about $1 or $2 dollars each.
I've purchased digital cameras, once, well over $100+ for as low as $3 (with a memory chip inside)!
There might even be printers and routers and other computer accessories for next nothing. A few years ago, I found an HP 400 series professional office printer with paper and the ink cartridge still in it at a Salvation Army store for $24. The cartridge was almost full and it worked great.
As for computers, for me, I am partial to Dell laptops. In the past few years, I've purchase 3 refurbished Dells running WIN 7, 10 and now 11 on them. I use the latest MS Office on them. All purchased online.
I mention the above since the last time I was in any of the Best Buys or other competing electronics stores, those are the items I see for sale.
I won't even go into clothing like name brand clothing and shoes donated or discarded before their use is over.
So, yeah, in my opinion, online sales and a saturated market with hardly any innovation to spur interest and purchasing has probably hurt the likes of Best Buy's sales and customer attendance.