To get a sense of the project and its goals I recommend reading this post[1].

Buying a used Pixel is economical, environmental, and likely doesn't support Google. Pixels are the only secure and open android devices that could work for the project and meet the extensive requirements[2]. This is because GrapheneOS takes real steps to protect user privacy and security, not features that degrade security and don't increase privacy. You are going to be doing much more against Google by using GrapheneOS because it comes with 0 google services by default and takes advanced steps to protect you from all apps and services you install.

If you are still not willing or able to purchase a Pixel, GrapheneOS has a partnership with Motorola to help them create compatible devices which will be available soon[3].

[1] Privacy and security on computing devices need to become far stronger to protect people from pervasive violations of their rights. https://xcancel.com/GrapheneOS/status/2044440381803069778#m

[2] https://grapheneos.org/faq#future-devices

[3] https://xcancel.com/GrapheneOS/status/2028448871374803007#m

Only silver lining to this is they run a lot of discounts and promotions on them, and it's possible to buy them at a significant discount. Got my first Pixel 10 on a very cheap contract with trade-in promos on top, and got a second Pixel 10 at a 70% discount from the RRP.

If you buy used, you save a bundle and google gets no money from you.

I still don't want a pixel, so I went with a used ebay phone and installed lineageos.

They have no choice at the moment, this is the ONLY hardware secure enough to even make effort in hardening the OS.

Everything else is meh, bad, or atrocious.

Next year we'll have Motorola flagship(s) to choose from. Can't wait.