I also had some bad experience from TigerDirect, but none with the CC and phone card thingy...however, I am weary now.
I bought a charger/sync from them for my palm...when i got it, the sync part works, but it doesn't charge. I called TD and they told me to call the manufacturer. After searching all over the place for their phone number, the manufacturer they said to return the item at point of purchase. I called TD and they told me they will send a new one to me right away and for me to send back the one that was not working...but they will charge me for the new one, but refund it as soon as i return the other one. To make a long story short, the new one didn't work either, I got charged for shipping of the new one and the bad one (told of $17.40). I called them up again and they said to do the same thing, I laughed and said, "Hell NO!...refund my money now and the shipping and then come and pick up this piece of crap you sold me"...(my gf always said I have a temper.) That was a month ago and I still have no refund nor a working charger/sync for my palm.
I hope TigerDirect comes crashing down.