They should show me the invoice, but North American companies generally fuck that up as well

You can ask for an invoice. O wait companies in North America cannot make proper incoices for some weird fucking reason.

It should just all be included in the price (excluding shipping and the fee when paying with a creditcard or paypal instead of a bankcard) and people should make more trouble out of them not doing that.

“Estimated taxes” what is that for bullshit? You can just calculate how much the tax should be.

I know it’s not how it works in the US, but if they advertise it for 13$ they should sell it for 13$ including tax.

The moment they ask for a tip they are not getting anything nor a repeat customer.