I love my 200 2.8's. All three of them! One is the older new FD model that I got in a pawn shop for $90. A bit beat up, but great images. Then came a like-new IF model as part of a kit on which I scored on E-Bay (F-1, FTb, 55mm f/1.2, 17mm f/4, 50mm f/1.4 nFD, 200mm f/2.8 IF, motor drive MF, low light Booster for FTb, Haliburton case, and more for $350). Unfortunately, I took that one out of commission by dropping it on a rock on the west bank of the Mississippi River on my way to the inauguration of the prez a few years ago. I dropped the camera, and the lens went flying while the mount stayed on the AE-1. Ouch! Once in Washington, I bought a used replacement from a local camera shop the night before the inauguration, since I did not have time to have my old version shipped to me. I cannot tell any difference in image quality between the two lenses. The IF is smoother and faster to focus, though it looks a little goofy with its straight and skinny body and wide front end.
I mostly got my broken one back together. Only the mount broke. The glass is fine, and the body just has a scratch or two. I think I must have lost a part in the mud, though, as I cannot get these two parts of the internals to link up the way they should.
Anyhow, good build quality, and good image quality. I'd highly recommend one of these. I find 200mm to be an extremely useful focal length sometimes. I knew I needed one at the inauguration for some of what I wanted to shoot, so I bit the bullet and dropped an unplanned-for $200. On the plus side, I had a nice Metro ride to get to the shop!