ID assist please? - Scott #11's #26's & #65's ?

Yes, they appear to all be 11's 26's and 65's. The 65's are easy; they are all too dark to be any of the rare 64 color varieties but not dark enough to be the 66 lake. The 11's are also straightforward; all the shades look common. Of course, the only way to tell a true #10 is to plate the stamp as color changes over the past 160 years, due to oxidation, toning and handling are common. The 26's are the hardest for me. The tight perforations at the top and bottom make it hard to determine if the outer frame lines are present (they are not for your 3 stamps) and if the side lines extend past the rest of the design (26 vs 26A).

Grills usually show up on scans from the back. If he notices any, have him send you a scan and post them. Scott 93 is the most common but you never know what you'll find. You can easily see the details of the grill points using Microsoft Picture Viewer to adjust the brightness and magnification. I'm sure many a poor quality 3 cent stamp with a valuable grill has been overlooked.