OnePlus has been one of the fastest-growing brands in the US thanks to its excellent products, which usually arrive with a very compelling price tag. These devices offer some of the best bang-for-buck alternatives for any Android user who wants to get top-of-the-line specs without breaking the bank. To make things even better, OnePlus and Amazon are constantly offering killer deals, which include the OnePlus 9 and other great devices, now starting at $300.