antiquary.net
The antiques trade has a credibility problem at the low end and a knowledge premium at the high end. A name sounding like expertise rather than retail positions a business at the right end of that, which is worth more than any amount of inventory.
An antiquary is someone who studies antiquities. It’s older and more scholarly than antiques dealer, and the learned societies using the title date back centuries.
It suits a dealer, an appraisal service, a research resource, a collector community, or a publication. The word also covers books, manuscripts and coins, where the antiquarian trade is a serious business with its own fairs and specialists.
Nine letters, four syllables, one spelling, a single dictionary word with no competing owner. The .net reads fine for a dealer network or reference platform.
The name is listed for sale. Offers considered.