I just got my 220 F slug gun yesterday. Paid $415 which is the best price I have seen. Got it at Ozark guns in Gastonia, NC. They had to order it, but it only took about a week and the price was great. Hope to figure out the whole mount thing soon. No clear choice Went with the Nikon Slugmaster 2-7 x 40 BDC 200 scope. Not too much available with long eye relief in quality optics (kahles, swarovski, etc...) but I have had good success with the Nikon Omega on the muzzleloader so hoping for the same results on the slug gun.
