BidCactus just released a new coupon code for June 2011. The code is K2T8BC and is valid for $10 off your first winning auction. Unfortunately this coupon is only good for an account's first winning auction. If you have already won on BidCactus you cannot use this coupon.
For those new to BidCactus.com, BidCactus is one of the original penny auction sites. They auction gift cards, home products, beauty products, electronics, entertainment and more. You can also read more at my BidCactus Review.