2005 z06
So if car is a real Z06 with clean title showing it a 2005, then run for the hills, since its sporting a fake vin number on the car and forged tittle.
Next could be 2005 with wide body kit, but best guess lacking the dry sump LS7, much less the other items on a Z06 that make is a Z06 in the first place.
Simply, if looking at the car in person, then pop open the glove box and look a the sticker. No one in there right mind is going to remove the sticker, so if missing run, and if still there, then make sure sticker matches Vin number of dash, and the sticker does show a Z06 RPO number.
Also, as part of a PPI, make sure that they pull the vin number from ECM and BCM, to make sure it matches the vin number. Hence this is how a lot of agencies are finding stolen cars, since GM flashes are done on vin numbers, and when the vins are swapped on stolen cars, the vin number is the ecm and BCM's can not be swapped (will screw up the BCM security code to brick the car).

















