I just received a Nikon 28-70 3.5/4.5 AF-D lens from Adorama today. It was listed as E+, bought it for $119.00. I took the lens out today and shot a roll of film with it. I seems to focus well, there are no visible scratches or marks on the barrel or glass. My concern is that when zooming from 28mm to 70mm it seems to bind at about 45mm. I need to tighten my grip and apply about double the force to get it past this point, it then moves easily again. Zooming in the opposite direction binds, but not as bad at about 50mm. This is the area where the barrel changes from shortening to lengthening. It seems to work fine, but I've never had a lens bind like this. Is this something that may loosen over time? It does not appear that this lens has been used much. According to Adorama's return policy, I have 14 days to return it for a full refund, less shipping. They only have two others listed, and neither is E+. What do you guys think?