Is the iPhone 3GS still usable/ worth it in 2015?

I'm thinking about getting a 16GB iPhone 3GS for £34 at CEX (Thrift Store) Mainly for music and taking pictures. I could go for the 32GB But there are none local to me, and I don't like ordering 2nd hand phones and tablets without seeing them in person first.

I'm thinking about jailbreaking the phone because I want to have a better experience. I know how to unbrick the phone if all fails, So I'm not worried about anything.

I know it does not go past iOS 6.1 Which is fine because I never really liked iOS 7
Opinions, please? If I ever get bored of it I could always sell it on ebay for alot more than what I paid for it…

I'll be getting a 12 month warranty aswell.
Does the USA have CEX Stores?

Its ok, but I wouldn't recommend it since it is the 2nd newest iPhone among those that don't get updates. I'd get at least the 4s which does still get updates.

It is always better to get a new one and frankly speaking I have heard about this iPhone for the first time and in case you are facing problem in securing your personal data on your device do install Leo Privacy Guard. The best choice when we need to secure our device and also one of the world's top ten apps.

  • Would my Iphone backup still be usable? Right now i'm running iOS 7.1.2 and i want to downgrade my iphone to 7.0.6 (to jailbreak it). If i backup my iphone while running 7.1.2 could i still put everything back on while running 7.0.6?
  • Is the iPhone 5s still worth getting in 2015? Is it getting obsolete? My mom might be considering on getting me an iPhone, but she said that i Can't get a 6. She might be getting me a 5s instead. I don't know when yet though. How many years will Apple support software updates? It is already almost two years old and is it still a worth getting?
  • Is the iPhone 5s still relevant in 2015? I plan on switching to iphone, I have a galaxy s6 right now but hear me out, I want an iphone but don't want to spend too much money, once I get one IIm going to give the galaxy to my mother, is the iphone 5s still worth it?
  • Is the IPhone 5 still a good buy in 2015? I'm getting my iPhone 5 tomorrow, and I wanted to know that if it's still a good Apple device worth a buy this year and I also want to know if it has any any battery problems?