...everything that grandpoopaa said.
This is a cash cow for the zbiddy people but you can make it work for you if you do the math and don't allow bidding to be influenced by your emotions or ego.
You can easily purchase bids for less that 3¢ each by bidding wisely on bid vouchers. Be sure to take into account the $2.50 'shipping' charge.
Do not get sucked into using EZ-Buddy (their automated bidding) It is programmed to burn up your bids and drive the auction price up. If you see more than two people that are using EZ-Buddy on an auction, DO NOT BID because the auction can not end until all of the EZ-Buddy bids have been used up.
There are probably a dozen Zbiddy users (I call them 'Zbiddy pinheads') that will not hesitate to burn hundreds of bids to bid an auction upside down. I don't know if they're that stupid or if it is just an ego thing but I've seen pinheads bid an item right up to face value! If you do the math that's auction price + $2.49 (Delivery cost) + at least $4.00 worth of bids.
I just saw a $10 Subway gift card close at $9.09
According to Zbiddy, they saved 9.1% off of MSRP but If you do the math, that's auction price + $2.49 (Delivery cost) + at least $4.00 worth of bids so they just paid $15.57 for a $10 card. WTF!
I have a list of Zbiddy pinheads and when I see any of them bidding on an auction, I won't waste my time or money bidding against them. Just watch an item for a couple auctions to see what the closing price is and if it closing at a high price, take note of the winning bidder's name.
That is the other thing...those auctions bid up at less than $10/hour so an iPad that usually closes between $200-$400 dollars would require that you spend at least 20 hours staring at a computer bidding in the hopes that you 'might' win it. In that amount of time, I can earn the money to go down to the Apple store and buy one.
Finally, 99% of bids entered with more than than 2 seconds left on the clock are wasted bids. Those are the people that are paying for the items and making the huge profits for Zbiddy.