Buy rebuilt 727 or get it done myself?

Dude! Be a 'stand up' sorta guy and tackle that simple mechanical device yourself. Don't let a buncha shills convince you to spend big bucks on over-priced labor, expensive un-needed internal trinkets, and shipping out the wazoo! It's justa 727 fer chrissake! So simple even a cave man could do it! (I sure do hope I haven't offended anyone)...