depends on finish & condition. blued,satin nickel, stainless or two tone. $270 -$320 in good shape. new in box $500-$600
around 1980.
The best I can do is say that your colt Combat commander series 80 was made from 1983-1996.
my guess would be late 1970's.................
How can I find out what year Colt Combat Commander Mark 4 Series 80 was made?
According to proofhouse.com ,a Colt combat commander with that serial number was manufactured in 1977. The 1978 series started with 70SC57900.
Published data does not go that high. You will need to call Colt
Published sn data doesn't cover your sn. You will have to call Colt.
10-800 usd
You need to call Colt to find out. That sn goes beyond published data.
300-700 USD
About $700-$850, depending on exact version and condition.
There is no such thing as a 70 series commander. It applies to the collet bushing that was made in the 70s. Your commander was mfg. sometime in the 70s without the that type of bushing.