I'm not a dealer, but have done all my framing and my wife's (she's a pastel artist) for years, and I've always used Light Impressions. But I've noticed a severe slide downhill ever since they moved from Rochester to California, and I have told them that. Freight on my orders now runs around 25-30% of the cost of the merchandise, about double what it was from NY. And on a recent order of some large frames, the freight was in the 50% range!
However... I have not yet found anyone who has their combination of quality merchandise and reasonably priced frames. But I may try some of the sources mentioned here.