Steve,
The certified weights have gone up in price a bit...last year they cost me $350 for a set for our matches. I looked around every site I could imagine and even tried the NBRSA, but those weights are not certified by an official agency and would end up costing just as much as any other site when you get them certified.
I have a my-weigh ultraship 7000that goes up to 15lbs and it is excellent for what we do. Dead nuts accurate and not very expensive from Old Will Knots.
Good luck with your search.
Mike