I've been buying refurbed electonics and PC stuff for over 30 years, some stuff was great, some of it was trash, and some needed to be further refurbed, by me!
One of the first things I bought were several Technics cassette decks to sell, I had a business selling stereo stuff back in high school. They looked and worked perfectly, and I only recently retired the one I kept after a motor failed after about 33 years! A friend's still works fine. They made some great stuff back then, much better parts quality than now.
That having gone so well, I bought 6 Pioneer stereo receivers and they were CRAP. All of them had at least one function/mode that didn't work. Most of the problems were due to bad soldering, really bad soldering. I ended up fixing most of the problems myself.
I bought a few refurbed Kenwood components and it was a total train wreck. Bad soldering and really bad service made me steer clear of them for years afterwards.
I bought a refurb Panasonic VCR, a very high end one. It lasted about 18 years and was great. I just had to replace it when it started eating tapes one day. I got it for less than half what it normally went for, so I got more than my money's worth. Sad thing is, the replacement, another Panasonic is pretty junky, and weighs about 1/4 what the old one did.
The refurb first PC item I bought was a monitor, a 19" Daewoo. It died about 2 weeks after the warranty expired. They wanted almost exactly the same to fix it as it cost me in the first place. I replaced it with a Sony trinitron that I kept for years until I needed a bigger monitor for my old eyes.
Next was my first laptop, a TI 4600, a great machine that still works great at 10 years+ old for web browsing. The battery was half shot when I got it, but I expected that.
Next was a refurb desktop that I bought for a friend from Gateway. It was a huge dog, it had MOBO issues, the PSU popped one day, and it was finally replaced by Gateway after almost a year of hassles. That one was a good one.
I have recently bought several refurbed radios off Ebay, all have worked fine, and appeared to be brand new in every way, including that new radio smell. I'm guessing they were DOAs that had a minor problem.