That is accurate. Most people try to get 1:100 if they sell gold, but if you buy tokens (gold on any server) its like 180k to 1.2-1.5k FG which is 1:120-1:150. So bulk buying tokens on a random server can be advantageous if you then transfer the gold to your own server using a guild transfer on battle net. If looking to buy small amount you will likely have to pay 1:100 rate to get it on your server.