If this is a bounty, can i ask why can't you pay also for shipping?
Expensive phones?
Its an iPhone 4 ? or is it a typo?
iPhone 7 > 6s > 6 > 5s > 5 > 4s > 4
That's about 7 year old technology, actually almost 8.5 years since the 4s was released late and almost the iPhone 8 (or whatever its called) will get released soon.
Yap, iPhone 4 is an old phone and we can get it with low budget. Here in my country, people can buy a used Iphone 4 with great condition for about 0.025btc or even less.
Probably for him it is an expensive phone, or maybe in his area the price of iPhone 4 is much more higher than other countries.