@Qaisrani
ranasrana is right the 280 was produced from 80-85. So its either a 260 or a bigger engine, or you're getting tricked into buying an older model. And are you sure the 60000 mileage is genuine, as they can be tampered with easily. You can judge by looking at the condition of the interior, the chrome on the bumpers etc.
The price also depends on the options like climate control, electric seats, leather seats etc. So cant tell for sure without that information.