Can i get an iphone 5s unlocked or T-mobile for 300$ now?

Like no broken screen like fully functional phone, do you guys think i can get it for 300$?

No. An unlocked iPhone goes for $649 brand new & highly doubt in only 5 months it would drop more than 1/2 its value

Nope you can't but possibly a 5. They still go for at least $400-$450 at lowest. If you can get one for lower then you are lucky.