Such price difference held me from hitting "buy" button - to start searching references to this pcbitcoinshop store.

you are indeed right. i misread your price as a 5d mk iv.
i went through the buying process. it doesn't even quote you a price in bitcoin or give a live invoice. it plops a bitcoin and ethereum address on the page and only leaves a dollar price.
how or who is gonna guess what the bitcoin price is? do you get an indivdual address so they know it's you? it says nothing.
on the basis of the sale process this is a definite avoid. even if it's not a scam, it's a shambles.