There are nearly 3000 furnishing plans. There is currently no in-game way to keep track of all the plans. There is also no way to filter out what I already know in the guild trader. This means that anytime I want to buy a furnishing plan, I have to scroll constantly through each plan one-by-one to find something that I don't know. I also can't search by category of furniture e.g. show me all the bookshelves listed. This is despite there being several categories of items. This problem is not unique to furniture plans. There are over 100 crafting motif styles and those are further broken down by individual pieces (14 per set or something like that). So, if I wanted to say find a cool chest piece that lets me show off my tattoos, then I can't filter out unknown chest pieces. The search helps with the categories somewhat thanks to some consistent naming patterns, but that does nothing to filter out the items you already know. Overall, due to the lack of filters, you're effectively punished for playing this game a long time (or spending a lot money). Since the more items you have, the more scrolling you'd have to do learn something new, just because the odds of finding something you don't as you acquire more of the items.

There may be add-ons that can help. But I am on console. I don't have access to add-ons. A feature like this should have been in the game years ago. Please improve search!