I use Calibre and its web server locally. Works great.
jbd
I do the same. Using VPN, proxy, Firefox container, tracker blocking, the whole 9 yards. I haven't seen price change based on location/purchase history. I've been looking for signs of this for a while. Prices do fluctuate quite a bit though. The site might have auto-selected a different "ships from" option for you, depending on how you're logged in.
I followed up with customer support. They said go ahead with the order and they will refund me the amount after. They gave me a $5 credit for my trouble. They said they would escalate this issue to the development team.
I noticed that some of these are apps and some are protocols. It makes sense to list the app if the protocol is proprietary, but it's confusing that there can be multiple apps for an open protocol and not all of those apps could feature the same level of privacy.
I'm just learning about all this. Looks like P2P is what I want. Thanks