If it is a brand they don't have in their system, it makes it much more difficult to sell. Most of my items aren't high end designers but they are brand names people know. However, I sold a couple planners that weren't brands that people would normally search for. I don't think many Tradesy buyers are even looking for planners. I think that most of my sales come from people finding my item in a google search. Perhaps making sure you use the right keywords could be the best thing you can do to get views and sales.
I really hate not knowing how many views each item is getting and how it is trending. They have the worst stats of any listing system I've used.
I've changed categories on a few items on Tradesy, but that messes things up. I have an item that I changed category on, and it showed up in both categories, then when I removed it after it sold on ebay, only one of categories got removed. The item still shows in my closet but when you click on it, it says not available. I can't remove it.