I make most of mine. But, some are gifts.
I make most of my own but the decorations that I buy, I get from all over the place, mostly department stores.
Purchased decorations are very few, most are gifts from others.
Thrift stores are great. Alot of things can be repurposed with a little creativity.
We have an excellent rural landfill which also has a goodwill barn. Last week I picked up some stain glass lamp shades.(2matching ) They were free !
I turned them upside down and popped them into wire hanging baskets. An insert to hold potting soil. They look spectacular outside with annual flowers growing in them.
Kirklands, Home Goods/Marshalls, TJ Maxx, IKEA,Target
Homebase, B&Q, Wickes. (These are British companies, so you folks will not have heard of them).
Uh probably Walmart I would say.
I buy most of the things for the decoration of my bedroom from Amazon online store. Recently, I ordered a Novaform Grande Mattress for increasing the lookings of my bedroom. I also use an eye-catching red cover/bedsheet for better lookings.
If you mean lampshades and Persian rugs , I usually buy them online. I don't have time to go to shopping centers to walk between alleys and pick out some little things. I'd rather do it online. Don't you think it's much easier that way? The main thing is that it is convenient and that the product is of high quality.