To buy or not to buy ('84 M6)

<< repost from M6 subforum >>

Hello,
I am giving serious thought to picking up a 1984 BMW M6. This car currently belongs to a friend who is moving to Germany (from cali), I know he would never sell it unless he had to, he has offered it to me for $10,000. This car is in SHOWROOM quality, last year it was repainted, the interior was redone (in white leather), and the engine was rebuilt and brought back to stock spec. This car would retail for around $18,000 (its in that good of a condition). Other cars in slightly worse condition are on autotrader's page for $20K. I have personally driven in this vehicle, I have put it to the max, and I like what I see.

The specs (from G-Tech pro on way to Las Vegas last year)

0-60 - 6.5seconds
max accel. - 158mph
horsepower - 298bhp

This is stock, for a 17 year old car. I was wondering if anybody had personal experiance with the M6 series? Or if anybody knew of some nice aftermarket performance products? I am looking to get around 350bhp with a supercharger, but I am not sure if there is one around, could I use a M1 supercharger on the engine? Quite a few resources say it is the exact same engine, so theoretically I could install a stock M1 charger, no? Then again in the M6 the engine is at a 30 degree tilt to fit in the chassis, would this affect placement?

First off the price is way too high, unless the car has few miles on it, but since you said the engine was rebuilt I'm going to assume that it doesn't. A 87 M6 retails for 10k with 98,000 miles on it. If you could get it for 8-9 I would grab it. Forget about putting a supercharger in it. The car will be a classic shortly (by definition) if not alreay (by enthuasist). If possible buy the car and DONT DRIVE IT. It it a classic one one of the original M series and it is doubtfull that there will be another M6... just like there will NEVER be another M1.