I have a set that I just pulled off my truck to replace with 99 coils. Between the previous owner I bought them from, and myself, they now have roughly 120k miles on them. They have a lot of surface rust on them, but are functionally perfectly. Actually now that Ive been running the 99s for a week, I think the 890s handle a little better, especially at low speeds. They were still sitting at a full 3" of lift, which is what theyre supposed to give.
I can take a few pictures for you. Let me know if youre interested.
Edit: I can also show you several recent pictures showing how my truck sat with the 890s.