Doxie,
You can get something functional for $100 but don't expect to be blown away by how good it is. I have a few Aimpoint 9000sc and its perfect for the AR. You can get one on ebay used for about $200. You can always add a magnified scope later and have them both on removable mounts for whatever kind of shooting you might be doing. For a good quality magnified scope expect to pay at least $300 IMO. Nikon Buckmaster is a good scope for about $300. I have a Leupold VX-ll on my AR's 2-7 power plus the Aimpoint.
You can get something functional for $100 but don't expect to be blown away by how good it is. I have a few Aimpoint 9000sc and its perfect for the AR. You can get one on ebay used for about $200. You can always add a magnified scope later and have them both on removable mounts for whatever kind of shooting you might be doing. For a good quality magnified scope expect to pay at least $300 IMO. Nikon Buckmaster is a good scope for about $300. I have a Leupold VX-ll on my AR's 2-7 power plus the Aimpoint.