The 99's average about $29K to $35K depending on the mileage. If it has under 30k miles you can count on it going for around $34K . It if has about 45K miles then it will run about $29K. That is the pattern I noticed at least. Of course you can find ones that have over 50k miles for less , but I wanted something with less miles. Mine will have 34k miles I got it for $27.5K. Main thing I look for is the HID head lights, no door dings or scratches. I run the VIN in car fax and through the Lexus dealer service dept. GS400 has 30k mile maintenance shedule that cost about $600 at the dealer and 60K maintenance schedule that cost $1500. Just be aware of that when purchasing one over those miles.