I have a box of roughly 490 green-backed cards and 290 black backed cards.
Most of them - I would say about 410 of the green and 200 of the black show signs of handling/shuffling but are in good condition. The rest have more wear or more significant bending (of course, if you're planning on sleeving them then it won't make much difference).
Please send me an offer by GM if interested. My current want lists are here.
If you'd rather buy them, that's fine too - that transaction would go through the BGG Marketplace so that BGG can get a commission.