There was a listing on YJA at one point involving over 100 film strips for sale. You jump on that one?
I went with the individual YJA sales, along with three unopened Blurays.
Evangelion film strips have reached a very low demand. There's barely any competition.
I doubt there's any resale value to this, and the amount of sellers thinking their wares are worth upwards of $200+ per frame just because the frame features a character are silly. None of it sells.
The ones that are good which I've seen posted on Japanese image boards
are going to stay in personal possession for a long time.
It's not something that takes up space that one might want to get rid of,
unless they need the cash.
Anyhow, I don't expect to buy any more film strips besides about four more.
In short: I give Evangelion film strips a "Do Not Buy" rating.
In and of itself, self-evident.