I came across a couple of BM with the A1 sights today. Only about 50 rds fired. What would be a good price for 2 of them? Post ban, 16".

I don't see many A1 uppers on Bushmasters at any of the local shops.  The stripped A1 uppers cost the same as stripped A2s.  That said, I've seen new complete Bushy 16" rifles (A2 & A3) for ~$780 locally.  Impact Guns has them for $749 on sale, but then you'll also pay FFL fees & shipping (but no tax!).

What are they asking for them?  Keep in mind, if someone buys a rifle and doesn't even shoot it, it is now a used rifle.  It should, therefore, bring a lower price than a new rifle sold at retail.

Hope this helps.