IMHO, it depends.
My first question is, are they 2333's or 2343's. The number listed, 2333-20, is what is stamped on the frames and every 23XX series engine produced after the original 2333's.
The 2333's were notorious for the paint flaking off the shells. From the photo, and it's not a great one at that, the paint looks good however, you cannot assess for other nicks, scratches... 2500 series cars with boxes and liners/paper, if they are all the same, meaning the nameplates match, hex nuts, rivets or glue and there is no rust or pitting of the aluminum that's important.
Presuming the AA units are full excellent, meaning no rust, battery acid damage, original portholes, and minor wear like box rub and the 2500 series cars match, have their boxes with liners/paper and also are full excellent then I'm okay with $450. That doesn't mean I wouldn't offer less. I might look at it this way, that's $50/2500 car and $250 for the AA set.
I would ask for better photos of each item and the boxes.
Just my $.02.
Mike