you will get these 4 cars when you hit 694 in game days.

Used Cars 1
Mazda 787B '91
Price: 1,224,999
Rotor 4: Rotory
654x4cc
715HP/9000RPM--->903HP/9000RPM Stage 4 Turbo 90,000cr
464.71/6500RPM--->555.20/6500RPM
4782x1994x1003
830kg
MR
Value: 306,249

Nissan R92CP
Price: 1,224,999
V8: DOHC
3496cc
848HP/7600RPM--->1155HP/7600RPM Stage 4 Turbo 90,000cr
621.38/5600RPM--->804.08/5600RPM
4800x1990x1100
900kg
MR
Value: 306,249

Used Cars 2
Nissan R390 GT1 '98
Price: 2,924,999
V8: DOHC
3495cc
712HP/6800RPM--->1059HP/6800RPM Stage 4 Turbo 90,000cr
602.50/4400RPM--->
4720x2000x1090
1000kg
MR
Value: 731,249

Toyota GT-One '99
Price: 2,924,999
V8: DOHC
3600cc
700HP--->1101HP Stage 4 Turbo 90,000cr
----
4840x2000x1125
900kg
MR
Value: 731,249