Are we getting the best price for this diamond?

size: .85 round brilliant
Color: H
Clarity: SI 1
Depth: 62%
Table: 57%
Girdle: thin to medium, faceted
Polish/symmetry: Very good/very good
fluorescence: none
Price (excluding 8.6% WA sales tax)$2993
Other info: This diamond was featured under the seller's "premier" section in his website, for ideal-cut H&A diamonds. Also the GIA cert. does not list crown and pavillion angles, does anyone know how we can find out what they are? (If it helps, the dimensions of the stone are 6.07-6.12x3.78 mm)
We'd love any advice, opinions. Thanks!

The price is right/ok (before tax).

The same stone has been listed by other internet dealers hence the stone was/is available in the diamond trading network.

Ask your dealer to provide Sarin measurements. If he cannot do it himself he should be able to inquire the cutter of the diamond.