How long will this car last for? (Recently redone head)?

I am trying to buy a new car and I found this great looking bmw on Craigslist. It has everything I want and much, much more. The only thing Im worried about is how long it will last. I dont know too much about cars (just what I learned in the 2 years I took auto shop) so I was wondering if someone could help me out with this.

The engine has 218k miles on it, but the head was redone at 200k- putting only 18,000 miles on the new head. I know that the head gaskets or head, or whatever is one of the main reasons engines die, but Im not sure how much longer it will last.

Some of this extra info will probably help to estimate how much longer this thing will run, so here is the original ad:

1994 325iS

CLEAN California title in hand-ready to sell

**Tags due in June**

I6 M50 Motor Runs Strong

M-Sport Suspension right out of the factory

NEW Suspension Components:

NEW Tie Rods

NEW Bushings all over

NEW Upper/Lower Control Arms

NEW Timing Belts

Cooling System Overhauled less than 2k ago:

NEW OEM Behr Radiatior

NEW Steward High Performance Water Pump w/ Metal Impeller

NEW Coolant Expansion Tank

NEW Upper/Lower Radiator Hoses

NEW O-Rings

NEW Aluminum Thermostat Housing

NEW Thermostat

NEW Driveshaft Guibo instaled less than 3k ago

H&R Progressive Race Springs--Car is low, Looks sick!

Custom 18'' Staggered Rims

NEW Federal Super Sport Performance Tires in the rear

80% Tread on front Falken 512 Tires

Short ram Cold Air Intake

Custom Dual square tip exhaust

Turner Racing Chip- gives really nice power curve throughout the power band

M3 Catalytic Converter-Flows Freerer , Passed Smog

Custom Satin Black Paint w/ Texture o the Touch-Come Feel for Yourself

Custom Door Mirrors w/ Blue tint

Spyder Halo Projetor Headlight Assembly w/ 6k HID

Euro Tail Lights

Clear Side Markers

96+ nose panel w/ facelift grills

20% Window Tint All Around

Imported e36 AC Schnitzer bodykit all around

H&R Race Springs

Momo Steering Wheel Model# 26

Custom Power Cloth Seats w/ Seat Heaters (Both Driver and Passenger)

Custom Door cards w/ same material as seats

Kenwood Excelon Stereo Unit

Amplifer

Kenwood subwoofer

Viper Alarm. Keyless entry w/ 1mile 2 way remote (Have warranty, will pass on to you)

NEW OBC (all pixels work)

LSD w/ redline fluid 3.15 ratio

Drilled Rotors

GOOD:

Car is modified and is essentially a completed show car

All the modifications listed above, might've forgotten something

Car handles like a race car

Seatbelts, etc. all working properly

Neutral:

Exhaust is noticeable but not overly loud.

Car needs High-Octane (91+) gas only due to racing chip

BAD:

Driver's side door panel is loose. I have the clips, will give them to you, or I could fix the door once time allows.

Driver's side bumper loose.

Passenger Side Door Trim loose

Sunroof Tracks need Cleaning (sunroof still opens)

This is a beautiful car, gets the thumbs up everywhere I go. I hate to sell it, but I've run into financial issues and I have to pay off loans before the middle of January.

Very inviting manual transmission and very sporty but car has enough power to spin out during a spirited corner in wet conditions.

Clutch is in good shape, was replaced before I owned it with OEM clutch, grabs really well.

218k on motor, but head redone by previous owner at 200k.

I will also throw in another OBC, a spare wheel and tire, and jack if needed.

Synthetic Oil Change done 2k ago, NEW Oil Filter included

Thanks in advance!