When it comes to cases, a good argument could be made for the Nokia Lumia 1320. The large phablet is by no means fragile, but it does pack a six inch display which could be broken (or scratched). Combined with the size, and some people may want to go down the road of treating this phone like an old school PDA.
The ROCK ‘Colorful Leather Case’ runs for about $10 and it can be found on various websites, mostly in eastern markets. It’s certainly a bargain and due to the design and decent quality, I have to recommend this case if you’re into this style.