500-800 depending on what "very good" turns out to be.
Yes
You will have to call Colt with the serial number.
Very poor description to base a value on. Broad range 300-800 USD.
The Colt AR-15 is a sporter rifle
$100 and up, depending on condition,markings,and history.
100-1000 usd
@ 40 inches.
Contact Colt, on line aucitons.
value depends totally on overall condition. you can own a junk colt worth $200 in parts. or, a good condition colt worth $1000 or more.
600-1200
Proofhouse.com has Colt sn data. If not there, call Colt and they will tell you.
To determine the age of a Colt AR-15 A2 HBAR Sporter with the serial number SP221219, you would typically need to consult Colt's production records or a firearms expert. However, Colt generally produced the Sporter model in the late 1980s to early 1990s. Based on the serial number, it's likely that this particular rifle was manufactured in the late 1980s.