Nuuvem is fine, good site - however they do region lock stuff thats supposed to be for a specific region, which is what i mentioned earlier about them making the effort to comply, so if they can make it very hard for a customer to cheat the system, other sites should be able to also (not an excuse, but a sign of their effort).
If you can get onto a pre-order early enough, before they've actually applied the rules as they're told, then they wont cancel the preorder and you'll be fine (helps to check with the supplier or developer though). I got the deluxe version from Nuuvem a fair while before they locked it down, got confirmation from them on Reddit that their keys werent region locked, all was good.
I checked if that could be bought, it stops me at the checkout page saying its not for my region etc. You could bypass it with a proxy, but as mentioned they check the payment account info somehow, so it stops you even making the payment i think (maybe PayPal have implemented something to tie in).
Its annoying really, im not even entirely sure why it wouldnt be considered price fixing. You're allowing some customers to pay one price, and others to pay another price, for no reason other than where you live. Its not taxes, its not any other legal obligation, its price fixing based upon location, and its the studios who are orchestrating this, not the shops (can you imagine Nuuvem wanting to stop customers paying half the price via them, than RRP at our local stores??).