Guild Wars 2

I have looked all over the interwebz and cant find one.
The reason why I’m looking is for a simple reason. I’m on my last craft to obtain Master Crafter, and I am getting lazy. I want to spend ten dollars on gems and switch them to gold, about how much would I get?

http://www.gw2spidy.com/

Currently:

• Gold to Gems is 3g 14s 36c
• Gems to Gold is 2g 27s 12c

It always changes, you need to check atleast 30 seconds before you actually buy.