

Yeah most 7" readers have the page turning buttons on the side which usually makes the device too wide for pockets.
The 6" readers fit my pocket quite well… So a foldable dual screen 6" sound like a pretty nice upgrade.
Most of what I use my readers for are reflowable text like epubs… But I guess if you could show a single page from a PDF across both screens then it might actually be big enough to be able to read while still being pocketable… You would probably want to go with the high resolution e-ink screens, like the one in the Kobo Clara HD (1072 x 1448). A combined resolution of two of those would be 2144 x 1448,

Start watching the second hand market. Most of my PC components are bought second hand, and at much cheaper than buying any of those components new.
None of these components are of course bleeding edge, but still sufficient to play any game I want.
I bought an AMD Radeon RX 5700 XT this summer for 1000 DKK (~€133 or ~$157).