Window Regulator

I am a newbie. I need to fix my driver window (left) regulator and saw a huge variation in prices for it. On ebay it can be as low as $28 or as high as $129. Is there a huge difference between the cheap and expensive version? Has anyone tried the $28 regulators?

Jx - I replaced my window regulators on my former 330 and from experience, I would go for the ones that either Bavarian, Pelican Parts, Autohauz, or one of the sponsors offer. Not that its a huge deal to replace, but I would not want to keep on doing it by skimping on cheap regulator.

Word of advice, when you replace, be careful with the connecting/disconnecting of the airbag.... You dont want to end up with an SRS light on ur dash.... Good Luck !!!