Hello all I just bought a collection of ar 15s that came from the colt archives. I am looking to find a collector who could help me with valuing these guns. There are too many to list and many of them I've never seen before but just to get started one of them is sp00022. This gun is factory fresh and can post pics if needed. Two others are tactical carbines #s bd000003 and bd000000. Yes all zeros never heard of this so I am looking for any help I can find. Also there are many with serial numbers starting with an x. Any info would be great.