Ask YC: To booth or not to booth ?

Hi guys,

We're working on the product for my new startup in the ecommerce space. No it's not another ecommerce site builder :) Our product should be ready in the next 5-6 weeks.

Our question is: should we advertise by having a booth at the Internet Retailer or shop.org conferences? Has anyone done this at these conferences and was it useful?

If not these ones specifically, what have your experiences been with booths at trade conferences or shows in your area of expertise?

Cash is tight as a startup and these don't come cheap so would love to get your thoughts.

Thanks in advance.