I was in the market for a vacuum last year and followed the advice in that topic. I bought a used Miele C1 Compact for $80. Great vacuum for my small apartment and I've been very happy with the purchase.

I remember seeing the Dyson Ball vacuum the first time in the store and being incredibly underwhelmed after all the marketing on TV. It was heavy, and felt like a bunch of cheap plastic that was going to break apart. Then I tried a few of those handheld Dyson vacuums in different Airbnbs I lived for a while. They were a pain to clean, hair would get caught in the spinning brushes, and the battery life on all of them was terrible (one would only last about 2 minutes, likely because the battery was aging). It always feels like marketing and "cool" gimmicks come first with Dyson products and the actual quality is second.