ThrashMetalFtw
Herald of the Titans

They're (short for They are) describes a group of people. "They're/They are a nice bunch of guys." Their indicates that something belongs/is related to a group of people. "Their car was all out of fuel." There refers to a location. "Let's set up camp over there." There is also no such thing as "could/should OF". The correct way is: Could/should'VE, or could/should HAVE.
Holyfury armory