This is probably a very noobie question but is there a place GB can be bought for fiat directly? From CMC I see Changelly but 1 GB is 630 USD, that's 200 USD more, and while Bittrex seems to match up nicely, BTC costs quite a lot now.
dude, the price is going to be the same in dollars or btc. they're all interrelated. you don't get a discount with a different currency.
there are tons of options to buy btc and most are better than changelly.