Maybe in your country you can get a new phone for 50 bucks. But here any new phone you buy (that being a smart phone) will be more than 150 euro. Simply because phones usually stay in the shop for roughly 6 months and are then being phased out.
Don't be a nazi. I got Sony Ericsson Xperia Arc S for 100euros when I was in Austria. It was my dream phone since 2011. As I couldn't afford it before, especially here in Croatia, as it's still around 300euros for used one. As SE don't make them anymore. Even it is the best phone ever made.
From that, you again see how pointless lego phone is. Big companie make awesome phone for 6 months, like you said. Then it's time for new, up to date, better looking phone. Even Arc S is the sexiest phone ever.
There are still companies that care about the mother nature. Every phone maker company cares, because it has to. That is why they make shitty phones so you have to buy new phone every few months. And not just because of the looks.
Every OS was made to get out taded pretty fast. So when you need a new phone, it's not about the looks or performance, it's because applications and games are built to eat more and more from your phone, for no particular reason. Plus, they make applications run slower on older OS and stuff like that. And not just the HQ games. It's applications like social network applications, calculators etc.
It's all about marketing scales.
If lego phone ever hits the shelves, it must have it's own OS that won't get outdated, 100000000+ market available applications and stuff. As bluetooth, camera, wifi, don't get outdated or broken if you don't break them. Only way they get broken it's when OS that runs it gets fucked up. So even if you replace camera or bluetooth on your phone, chances are it wont work as OS is still fucked up. So you will have to update/fix your OS. Or lego plans to run like desktop PC? But anyway it want's to go, the competition will eat it! It's too late! And it never ends!!
Get it?! It's endless circle! And it's spinning around! Everyone want's to sell shit fast! 23! You know!? #illuminati