How much would you buy this infiniti for?

You can try asking the seller for $15K but I would suggest going to KBB to check the overall market value of a G35. You did state that the vehicle is a salvage title which is an indication of immediate depreciation value however be aware that any car that has a salvage title is automatically voided of its factory warranty. And when you say it has a "Salvage title due to minor front end accident", thats no minor accident. If it was a minor accident it would be a rebuilt title, a salvage title is an automobile title with a notation that the vehicle has been damaged in excess of approximately 70% of its pre-accident market value. In other words this vehicle was considered "totaled" by the Insurance company because it cost too much to repair in damages. Someone basically bought it and repaired it. The quality of the repairs are very questionable. Don't get me wrong I think Infiniti builds the best luxury sport cars next to BMW however you dont want to be stuck in a money pit if this car starts giving you problems.