i'd price the car in the 52-55K range. The black 1999 was the only Black ACR with forged internals. Im also assuming the interior is black, i dont know if they made black/connoly interior, if thats the case then much lower.
The 1999 ACR's IMO are the best viper ever made, yes im a bit biased but i knew what i was buying and what i wanted. The only year with forged internals and ACR package was 1999, also has 18" wheels, adjustable steering, power mirrors, etc...