nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqke68qh59qkyeel06lqg32kr29yud4tk6dm4lxp7624lefqr74xdqht0hde Open Book Touch? https://www.crowdsupply.com/oddly-specific-objects/open-book-touch

nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqke68qh59qkyeel06lqg32kr29yud4tk6dm4lxp7624lefqr74xdqht0hde I wouldn’t recommend it because Amazon is shit, but a Kindle Paperwhite can get you all of that except the SD card.

nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqke68qh59qkyeel06lqg32kr29yud4tk6dm4lxp7624lefqr74xdqht0hde not sure about affordable and it's microSD instead of SD but Boox Palma seems to fit https://shop.boox.com/products/palma

nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqke68qh59qkyeel06lqg32kr29yud4tk6dm4lxp7624lefqr74xdqht0hde I am happily using the XTEINK line and rumour has it they will soon have a version with backlight. It already does all the other things you ask for.

nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqke68qh59qkyeel06lqg32kr29yud4tk6dm4lxp7624lefqr74xdqht0hde why not an actual phone? Just run it in airplane mode and stay offline. My Huawei P60 still has a memory card slot (unfortunately it's Huawei nanomemory, not microSD). AMOLED display is ...

nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqke68qh59qkyeel06lqg32kr29yud4tk6dm4lxp7624lefqr74xdqht0hde I know this isn't what you're asking but I retired my eReader and now have ReadEra on my phone. Does everything you're asking and it's free. I am frequently without internet access a...