DON'T BE SCAMMED! Thank you for all of these reviews...
I tried to buy a Blackberry Q10 from Craiglist, the seller answered me FROM A DIFFERENT email address: "Hey A guy just purched this from me, but I can tell you where I got it from. I just got 4 of these from here biddycacts.com and I resold them for some extra money...", and told me a trick to win the auction. When I replied to the person just to say thanks, I received a "Delivery Status Notification (Failure)", so I resent the thanks message to the original email address I reached them the first time. The seller responded me with exactly the same text from a THIRD DIFFERENT email address. That is what made me dig in Internet about this scam site.
While I was investigating, I start registering at bidcactus.com. They asked me for my preferred way of payment in order to complete the 3 steps to registration, and fortunately I chose Paypal, that disclosed me the hidden transaction for US$75 plus shipping and handling charges.
LET THE PEOPLE KNOW ABOUT THIS SCAM!