I am a warrior in a Naxx guild and I am sure most warriors complain about repair costs as with anyone excpet hunters and warlocks (hellfiring to death) from those - bad pulls, key person dead, etc etc

well next time your raid leader calls for a quick wipe and do over:

Slap this on and skip the repair bill!

http://thottbot.com/?i=11666

You realize that it only does the dmg to the player during the 10 seconds that the speed bonus is active right? Meaning at most it drains 2500 health if it does max dmg on each tick.

if you can afford to wait 30 seconds for the skull to cooldown you're probably better off finding a safe spot and alt-f4'ing

Obviously, the correct solution is to wear http://thottbot.com/?i=11896 for the entire fight.

You've never actually done this, have you?