My 23 year old gas water heater tank decided it no longer wants to work (lazy bum). Ordered a new one and not wanting to go without hot water for days, had to pay a premium to find an installer with one on hand. Lowe's has diy youtube videos on how to replace your own gas water heater.
Transmission, heater cores.......remembering the Motoring thread here, decided to pay the premimum.