Problem with console games is that digitally they're available only in 1 store. And some keyshops which we don't support. So there isn't much to compare.
As for boxed games, it's certainly possible, but out of all 19 supported regions (and we may add support for more), every single region has different retail stores, different delivery policies etc. It's not that simple, but who knows? Perhaps one day we will become an ultimate price comparison tool for digital/retail games for PC, PS4, XboxOne and Nintendo Switch 😉