Price check on a 1975 Colt AR-15 SP1 Preban?

Question

Trying to determine a price for above rifle. Seller says it has not been shot much although he is not sure since it belonged to his father. I've seen some pics and it looks old like I would expect a 1975 rifle to look like.

Thanks for your help.

Answer 1

Between 800 and 1200 depending on the condition and model.