Easy and inexpensive way to fill up a wall

Now that spring is coming I am wanting to change up all of my decor. One of the quickest and least expensive ways to fill a wall with art is to use vinyl wall art. These are from Etsy sellers Elephanie , TastySuite , Byrdiegraphics . They just stick to the wall!...how easy is that? Etsy seems to be the least expensive place to buy great vinyl art. I know that Pottery Barn has recently started selling it but, you would have to sell a kidney to buy it!