You have plenty of time to get an edu email off eBay in time to place an order.
Promo codes don't stack so referal links are useless!
PURCHASED THROUGH T-MOBILE https://www.t-mobile.com/oneplus
For a limited time, the OnePlus 6T (FRP: $580) is available from T-Mobile for more than HALF OFF ($300) – that's $0 down and $11.67 per month for 24 months after device credits when you trade in an eligible device and get your OnePlus 6T on T-Mobile's interest-free Equipment Installment Plan.
Starting November 1, 2018 at 6 a.m. ET, for a limited time, new and existing customers who purchase a OnePlus 6T can get it for 50% off via monthly bill credits when they trade in an eligible device-that's a $300 savings.