The going rate for gold is around $1.30 / mil. You may be able to get that through luck by posting it on the RMAH, but most people who browse the forums and such have a pretty good clue about the price so you may wanna consider lowering that a bit.
Like the guy above me said, there are better options on the AH and RMAH right now, and most people here are not idiots when it comes to this sort of thing. Good luck getting 80m (I don't buy that you have a current offer, I believe 80m is what you would like to get. If someone is really offering 80m then you should take it).
And on a side note, don't save screenshots using jpeg compression.
C/O 80mil
Willing to sell on RMAH as well...$2/mil
auction ends in 24hours
Battletag: Bingobango#1657
On a different note, nice find and good luck
And on a side note, don't save screenshots using jpeg compression.