So, I found Pinterest. While this site can be used in a manner similar to Tumblr or WeHeartIt, it's also very well suited to listing clothing items. (Or any kind of wishlist, really.) You can "pin" the picture of an item you want, and then tag it with price as well as whatever else you'd like. I personally tag the price, type of item it is, the brand, and the colorway I'm interested in. Here's an example of my wishlist. Could use it to keep inventory of items you already have as well, and show off your items.
Didn't mean to sound like an advertisement, but I thought you ladies and gents might appreciate this.