[] I cannot understand why RCU does not have a category for aircraft retracts. Certainly, there are a number of members (myself included) who wish to buy or sell some. The value of many of these retracts are substantial... exceeding the values of many airframes and other "aircraft" items. It would be nice to be able to click on Robart or Sierra or Century Jet or Likes Line, etc. I want to buy some now, but darned if I can figure how to place the want ad. I am certain there are members who'd like to sell some, but probably can't figure how to post them. Do others feel the same as I on the subject?

RCU does have a category for retracts; it's a sub category under airplanes-

Airplanes > Accessories > Landing Gear & Tires
http://www.rcuniverse.com/market/category.cfm?catID=298

If you need help submitting an ad, we have tutorials for you, available by clicking the HELP tab in the marketplace-
http://www.rcuniverse.com/market/help.cfm

Your other option is to search "robart" or other search terms in the marketplace to find what is currently for sale.