Hi philmgro, to answer your questions:
The price is fair for the mileage/age, The 16vt was discontinued after N reg tho. Are you sure its a 16vt? could be a very late one i suppose.
You need to ensure that the cambelt has been done, they say 72k is the usual mileage, but as the car is over 7 years old I would be looking for this to be done. The cambelt change costs £800 from Fiat
you can get them done at coupe specialists such as powerfiat for around the £399 mark, which is an excellent price, I would trust a specialist over the fiat monkeys any day
Also you need to ask if it comes with all the keys:
The red key: this is most important, this contains all the codes for the electrical system, to replace this would cost a minimum of three hundred squids
The silver key: this is the nicey looking alloy key
Also a spare key: I never got this with mine, costs about 60 to replace.
You also want to be looking for smoke coming from the exhaust after the car has been idling a few minutes, a sure sign of a turbo on its way out!
If the cambelt hasnt been done, barter with the dealer to take this into account, if he doesnt want to play, walk away!
Hope this answers your questions