Aliexpress is full of makeup brush dupes that are great quality for cheap. You'll often get a Makeup brush that is nearly indistinguishable from an original. The Tarte brushes are usually great. Some vendors are better than others so make sure you read reviews and look at the review pictures. I checked out an actual airbuki brush from Sephora and was not completely impressed. It was a tester and it was totally lopsided and uneven. So you might want to save your money and get a $5 dupe in that case.