That would be pointless, the idea is to have an anonymity set
Discussion
I understand the desire for anonymity. What about the raspberry pi solution doesn't provide that? Because of how you purchase it?
Building it myself or being the only one with a device like that would connect it to me. No microphone or camera would be needed for the authorities to identify the owner of the device because there's no one else with that device. It would need to be mass produced to have a chance at an anonymity set
Lots of makers buy raspberry pis with screens. You can buy those online, or maybe even from a store like Microcenter with cash or gift card. Some stores might take sats.
Pretty sure the government doesn't know what I 3d print on my printer...
It being unique to you doesn't mean it harms anonymity unless you are posting it publicly under your name... I guess the other option is to post it publicly under a psudeonym so other people can build it for themselves.
I think the hardest thing about this device would be input controls for browsing the web... That would be tough. Touch screen might help.
I doubt you are going to find a device like the one you are searching for in a big box store because its precisely the thing that would take a lot of support, would probably advertise to you, and would probably have trackers and analytics like crazy to capture location, browsing history, etc. The incentives aren't there for a company to build a privacy-minded device like this.
You're not thinking this through. For example, you're not accepting that creating a device and then suggesting other people should build it is far less anonymous than buying a mass produced device and recommending other people should buy it. You're pretending there's no point to trying to gain an anonymity set because everything is full of trackers anyway, yet you also pretend you can safely bet the authorities don't know what you print on your 3D printer.
You're not showing me a raspberry pi with a screen that I can buy to use it for web browsing, without it needing further DIY configuration that helps make it traceable
Best of luck, hope you find the device you are looking for and prove me wrong.
I hope so too.
To be fair, if you replaced your phone with a raspberry pi build and then had a conversation with someone who doesn't bring their phone everywhere, it would at least be really useful for stopping the conversations from being listened to.