Online marketplace Bonanzle has continued to build its base of buyers and sellers, with membership growing 18% in just the past 6 weeks, standing now at 236,000 registered users. Popular with small online and eBay sellers, the site will turn two in June. Bonanzle receives 1.5 million unique visitors a month and has close to 20,000 active sellers responsible for a total of just under 3 million listings.

Bonanzle employs four people, including founder Bill Harding. That is, if you don't include the users. Spokesperson Mark Dorsey said the company receives tremendous support from the community, from reporting fake items to spreading the word about Bonanzle. Mr. Dorsey said that, based on the site's growth, the company would definitely be adding designers and programmers in the future.

In October, Bonanzle launched an API in beta that allows third-party developers to provide services and tools for buyers and sellers; it remains in development. The biggest priority for Bonanzle, according to Mr. Dorsey, is making sure buyers have a good experience and come back again to the site. Helping with that is a new order resolution center that allows buyers to open up cases with sellers with Bonanzle as facilitator.

Bonanzle calls itself, "Your destination for everything but the ordinary," and its goal is "to be the simplest marketplace online, with an upbeat community that makes buying and selling fun again." So not surprisingly, "electronics" is absent from the top categories, which include Clothing, Jewelry, Home & Garden, Collectibles, Health & Beauty, Crafts, Books and Toys & Hobbies. You'll find cool vintage electronics, Mr. Dorsey said, but you won't find hundreds of identical iPhone covers, in part because the site limits sellers to 10,000 listings.

Aside from a seller base that actively promotes the site, the company purchases Google ads on 10,000 keywords and is about to launch a display ad campaign on various content sites ("yet to be named," Mr. Dorsey said.)

Bonanzle has no plans to slowdown - the company said it is targeting traffic of 5 million unique visitors by the later part of next year.