Just think, you have a guitar for sale in the classifieds. Gruhn Guitars calls and says they'll pay your price if you can ship it out today. You see the "Gruhn Guitars" name right there on your caller ID, you see the correct store phone number. They offer to pay your price plus cover shipping. They say just drop it off at the local UPS Store and they will call them and instruct them to pack and ship it using Gruhn's account. They will overnight the check as soon as they receive the guitar. Who would doubt Gruhn's Guitars (insert other big name/respected dealer) calling from the correct business number? Say goodbye to your guitar..... for those not aware: http://www.spoofcard.com/index.php This is phenomenal. Now anyone can place a call and have any name or number they wish show up on the recipient's caller ID. For those of you who insist on a phone call from an Ebay seller to make sure they are who they say, not an account hi-jack or identity theft, now anybody can appear to be whoever they wish by buying minutes on this card. If you think about it, the possibilities are endless. Just amazing that scammers now have a tool like this.