I used bitForex to buy my GRIN.
do not think that your location is a problem.
Yea I bought some on kucoin yesterday but have btc on bittrex don't wanna pay the fee to move it IDK why I can't buy it
Yea just heard back from bittrex support they only offer grin to international customers...
It caused by the regulation of US, GRIN is not compliant with US regulation and that's why you as a reguinal customer can't buy grin or being prevented by bittrex to buy that.
Binance recently was doing the same to a lot of altcoins to create a limitation for US users.