That does look very nice! First off - hold it only by the edges and don't touch or rub the surfaces at all!! Ok, hopefully it is not gold plated but a reverse image is necessary to properly put a value on it.
I apologize this is not the real picture of the coin (it is from google) I cant upload any pictures from my camera the pictures were to blurry and I couldnt use my scanner its on the fritz right now. It looks almost identicle to the one shown. I will have a Photo uploaded as soon as I fix my scanner.
It would be better to wait until you have pics of your own coin before asking for a value or critique. Lately, on this site and others, a lot of new members have been copying pictures from other sites and google and giving the impression that they own those coins. Some members here have actually had their own coins copied and posted by new members. It leaves a bad taste when someone spends time to educate a noobie under false pretenses. For an accurate analysis, wait until you can post a pic of your own coin. The members here are more than willing to help out.
In the mean time, can we guess where you found that photo. I am going to guess that it is a Bowers & Merena photograph.
i never seen a gold toned buffalo till i seen some ngc ms65 ones at a local dealers. now it seems i am the only one without one. them ms65's are so toned, they almost looked like they were dipped in gold. so some GOOD pictures are going to be needed.