As AAGD's comment recommends, there's lot of websites that offer you to open your own online shop and offer your line of products (eg. Zazzle, Cafepress and... Society6). The benefit is that you get to customize your own products, there's usually no fee for you, you don't need to have any inventory and you don't actually sell any native file; therefore people cannot really copy them.
You could also consider selling your patterns as Stock Images (istock, 123rf, dreamstime <---this last one, I don't really recommend). Your vectors will be valuable to some designers and it can be a passive income very easy to manage. Simply look for stock image sites online and see how you can join and what are the terms.
I wouldn't recommend selling vectors directly from your own website. There's some benefits in using a third party for this; you don't need to manage the hosting and distribution yourself, and you get some protection on your artworks. It's not always easy to sell digital files online. For example: People who decide to buy your image from a stock image website might need to purchase a commercial license as well to redistribute your art. Another example: People will hardly be able to share a download link of your file after purchasing it (that's usually a challenge with selling digital files.)
If you do decide to sell your design packages yourself, you should definitely consider Rishab.Ag's answer, and create different package price as he suggested.
The point is: if you plan to sell patterns to be used by others on their own products, stock image sites is probably the best option for you. And at this point, why not gain some visibility by actually selling the products yourself since you are the artist who did these patterns! Also, working in vector is definitely the right thing to do.