If I understood your post correctly, your total out-of-pocket cost was $8,231 USD, after the 3% discount and addition of 24% VAT. Effectively a 21% add for you.
So to get to base cost of the diamond, we do simple math: $8,231 / 1.21 = $6,802 wire price
Using the PS diamond search, I cranked down the search parameters to get you a sample pool that closely represented what you actually bought. I see prices from about $5,930 to $8,727.
To dissect those prices further, around $7,000+ is where you begin to dip into H&A stones if you would have used a supplier like JA. There is one JA TH stone listed at $6,500 but it has a cluster of clouds on the table and I wonder if it's truly eye clean in all lighting environments.
So I think you paid on the upper end for virtual inventory, but I also think you got a stone with highly sought after cut proportions (57 table, 61.8 depth, 34.5/40.8, etc) that we would have recommended.
Customized PS Diamond Search
1.00 to 1.06 carats
G color only
VS2 clarity only
None to faint fluorescence only
55 to 57 table
60.5 to 62 depth
Excellent to ideal symmetry
Excellent to ideal polish
GIA or AGS labs only
In-house or virtual inventory
All correct, I had done the same search (on both JA and BN) and my stone fell in the upper end of the range. I found a very similar one, 1.03 ct, for $300 less and the image seemed look great. If 7000+ is the begin of H&A, my choice to take a diamond without pictures wasn't smart...we can say "stupid"