it was $140 for mine. with lifetime warenty.
he may be charging you more for illegal tint, extra for windshield, higher quality tint, etc.
that seems high for the "lowest in town". there are place around here that will tint for $65-$100, but i wouldnt let them touch my car.
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black -daily