Depends on where you're based for the price. But fairphone 6 is cheap and you can buy it with a custom OS straight from the website - e/OS, which I believe is derived from LineageOS. The e/OS version is £570.

That's one that I'm using. It's great, I've had no problems with it and, if anyone wants to, my banking app works good.

Currently reading Better Than Revenge by Bea Fitzgerald, The Lotus Empire by Tasha Suri, Why Women Have Better Sex Under Socialism by Kristen Ghodsee (about economic arguments rather than anything else) and We Will Not Be Silent by Russell Freedman.