alt Hacker NewsUnfortunately the privacy/security features GrapheneOS requires as well as just the ability to replace the OS are only put on premium phones. You can buy an a series Pixel a few years behind to get it in the price point you want. But this won't save money long term because the price per year of support is worse than newer models like the 10a or 9a.
So, 7a at your pricepoint:
https://www.ebay.com/itm/820099695470
But, it's only supported for 1.6 more years.
So that puts it at $143 per year of support. While the 10a [1] will be supported for 6.4 more years, which puts it at $55 per year of support.
Although if you just want a degoogled phone with some features and don't want to hide a criminal enterprise, I doubt an out-of-support Graphene phone is any worse than an out-of-support Huawei or Xiaomi or Realme or Motorola phone.