I've bought phones, some are really good, some suck. I'd say I've had about 50/50
Discussion
tell me about the sucky ones
what has sucked?
battery and waterproofness?
I've had some poor battery ones, or internal damage that wasn't specified in the listing.
I also bought an iPhone 16 Pro Max that was still iCloud locked so you need to look out for that as well.
I would say the worst issues is battery and stripped out charging ports.
you bought a used one or a refurbished one from a licensed and credible vendor?
Same.
Phone was crap, could not charge any more after a few weeks.
Laptop bought in 2017 still works without problems