Maybe I have been lucky but I have never broken a creen and have dripped my phones a lot, up until the 6 I didn’t use a case either. 6 is so thin it needs one.
Luck seems to have a lot to do with it…
I abused my 4s badly… dropped 4′ onto hard sharp bricks and was fine.. then years later I dropped it less than 2′ onto soft tarmac and it just shattered..
My 6s (replacement for the 4) fell onto a fairly soft laptop charger on a carpet and broke… the 6 is especially fragile not only is it paper thin but it also has a curved screen (subtle but it is curved) that means it can’t take normal sapphire crystal glass type protectors.
On the bike I used a quadlock … on the back its really rugged but the front is just the plastic poncho but its been fine on the bike as a GPS..
I did look at a armoured type but couldn’t find one that protected the front as well as the back (unlike previous models without curved screens) so I used a wallet type protector. Weirdly it was in the quadlock but without poncho on my desk when it fell.
Buying wise I haven’t had a problem off ebay using normal sensible rules like no new sellers or private sellers with loads of possibly nicked goods. It’s just mainly common sense and not falling for too good to be true.
iphone 6 was ebay private seller … seemed legit and was…
Gumtree (sadly) seems to have become a advertising place for stolen goods or scams… and gumtree do nothing about it… (in my experience having flagged a few where the seller has a too cheap to be true item in your town and when you check 20 others but is out of the country but will you wire the money to a dodgy place)