is this a good deal? and nitrous question!

ok i found a 95 stang white with gey interior. it has only 50k original miles. Here's the list of monds:

-Trick Flow TFS-R intake manifold
-BBK 70mm TB
-Mac CAI
-Diablo chip
-73mm vortech mass air
-BBK jet hot equal length headers
-Bassani O/R x-pipe
-Flowmaster catback exhaust
-E303 cam
-Edelbrock aluminum heads
-190lph in tank fuel pump
-Heat treated racing pushrods
-24lb fuel injectors
-windage tray in oil pan
-MSD ignition coil
-Heavy duty timing chain
-underdrive pulleys
-1.6 roller rockers
-9mm wires
-billet alum fuel pressure regulator
-T56 6-speed tranny
-aluminum drive shaft
-3:55 rearend gears
-heavy duty clutch from DD performance
-eibach lowering springs
-heavy duty quad shocks
-BBK caster camber plates
-Bilstein shocks & struts
-Steeda 18x9 ultra-lite chrome wheels
-nitto 555 285/35/18 tires w/lots of tread left

also included is a 351 conversion strut tower brace and the nitrous listed below in my sig.

im going to buy it for 7500 is this a good deal? also he used the nitrous 10 times (1 bottle) and blew a head gasket. he fixed it but could it have done damage to the block?

The head gasket was already replaced. the trottle body forward and the distributer just need to be put back on. im just hesitent about buying a car i can test drive before i buy it. and i know it didnt damage the block when it blew but im wounder what effect 10 shot of nitrous has on a stock block? also he did tell me the reason it blew was because the timeing was off.

NEVER mind 50k miles my ass. just ran the car fax and dmv reportes its been rolled back 90k miles!