[Ologn]

All good advice.

If the OP owns a Pixel, and he is compiling LineageOS (or AOSP), a first target to consider is - an emulator (AVD). Emulators are easy to create on the fly, you don't have to worry about what its particular quirks are, or if it uses an A/B partitioned system for OTA, or worry about accidentally bricking it. And if you have emulator A but accidentally compiled for emulator B, you can just create emulator B.

These are the devices LineageOS supports - https://wiki.lineageos.org/devices . You may note that some of these devices are older, and probably not in sale in local stores. So make a note of which phones on this list you can go to a local store and buy today. Last year, I looked around for cheaper Motorola phones, but they were the previous year's model and harder to find at a local store, so I got a Motorola Edge 5G and successfully compiled LineageOS and sideloaded it. You can get the devices however you want, but check this list for what is supported by LineageOS, then check how easy they are to get (as I said, some of these devices are years old and are harder to find).

[pedro2]

Pixel 6a, 6 and 6 Pro don't have LOS yet -- at least stable. I don't remember why.

Pixel 6a are at a "good" price by western measures -- €350