[thstone]

The fan noise you hear is most likely either the radiator fans or the engine compartment fan or both. These will cycle on and off somewhat randomly, especialy the engine compartment fan. They are definitely not directly speed dependent but they might appear to act that way under certain conditions. I know that if my engine compartment fan turns on, it tends to do so when I stop (but not always).

I wouldn't worry about the IMS much. If its gone 156K miles, it is likely to make it to 200K.

The fuel gauge could be out of calibration or something is broken. Assume something (like the sender in the gas tank) is broken and you won't be disappointed.

Please, please, please spend the $300 and get a Pre-Purchase Inspection! This will tell you the condition of the vehicle and what needs to be fixed and how much it will cost. I can assure you that a Porsche with 156K miles is certain to need some fixes. I know its a pain in the rear but it will be the best $300 that you ever spend.

I'd definitely work the seller on the price. About 8 months ago, I bought my 1999 with 82K miles for $10K - and Boxsters haven't gone up in price since then. Its a buyers market and this car will at least need the fuel gauge and the motor mount and likely a few other things fixed/replaced.

In terms of price, $9k is near the top of KBB retail. A more realistic price in this market is $7500. I'd offer $7K and use the PPI to justify the lower price and negotiate from there.