hi savoir,
I think it really depends on the price of Gold also or platinum at point of time. The best comparison, maybe you should go to other jewellers, with the same design, then ask them to quote you. I also made 2 pairs of rings with them.
For me I custom made 2 pairs for rings for 2.5k.
1 pair of simple white gold rings
Lady one is around 2 mm wide, and 1 mm thick , size 10.
Men one i think around 3 mm wide, and 1+ mm thick, size 18 (total 700 dollars)
1 gold ring size 18 (this one quite thick) cannot remember the measurements - 600 dollars
One diamond solitaire 0.235 , F color, (cannot remember the VS details.), size 10 with gold band - 1200 dollars .
Erm, since we made so many rings, we ask them to give us a good discount.