I'd like to show you what I received in the mail today. This set of copy sketches is named Key Animation Clear File and was sold by Shaft at Comiket 84 a few weeks ago. This set covers two cuts from the first movie and it has all genga printed on A4 paper, even with registration holes.

The outer package.

Plastic 'clear file' of OP C-38.

This clear file had 14 genga and 1 background layout in it.

Plastic 'clear file' of part A C-71.

This clear file had 2 genga in it.

As a bonus each set includes a single frame of a film strip in a cardboard packaging. I was hoping to get Homura, but Madoka is nice too. I checked inside the packaging to confirm it is a real film strip.
I made four animations using the genga in this set. I used a standard of 4 fps in these animations. I hope you like them!
Final cut OP C-38
Key animation OP C-38
Edited key animation OP C-38
Key animation part A C-71
Edited key animation part A C-71
You can find the individual sketches here.
So, what do you think? Are official releases like this a good substitute for original artwork or would you rather ignore a series if there are no original sketches available?
P.S. I thought it was funny I found the first cut in this news article.