Replying to Bidding on air fares (priceline.com)

hey guys just wondering if anyone here bids on travel tickets like airfares from priceline.com or any other auction website....how does this work? like what is the advance time they give you like when you will be leaving and such...If any of you guys have done this before let me know what your expirience was like..im more concerned in like how long before my trip will i be notified when i will be taking off and the final price i will be offered and such???