Bought a Used iPhone 7 Plus on eBay...

Hi everyone, I bought a used iPhone 7 Plus on eBay recently for around $30 and learned after the purchase that, through the check of its IMEI number, it is iCloud-clean, but has Find My iPhone turned on. The display is in really bad condition, but I can make out a message on it saying that the iPhone is disabled and to connect it to iTunes. The network is also readable, showing it as connected to Sprint.

Basically, what I want to know is, is it worth having this iPhone’s screen replaced or is it unusable due to the Find My iPhone service being on?