Depending on accessories, barrel, and condition; you shouldn't pay more than $1,400. Unless it is piston operated.
Depends on model.
Depends on condition, etc. Price range from 500-1000
$800.00
100-1000 USD or so depending on specifics.
1977. Value depends on conditon and accessories. Range 500-1100
Not recommended.
Made 1974 if sn reads SP33829. Value depends on condition. Range from 500-1000
The AR15 series
What is the manufacture date of a Colt AR15 rifle serial number 192754 model SP1
50-1200 usd
12k-16k
Proofhouse.com has Colt sn tables. Value from 100-1000 USD dependingon condition, box, manual, accessories.