Which paint gun is good?

Greetings, I thought before I bought some schmarn I would rather ask you, maybe someone has already had experiences and can help me. At the moment I have only one China paint gun from eBay https://www.ebay.de/itm/254663694557?… With 100 ml cup and 1.0 nozzle. With the gun I have painted 2 cars half and my 924 complete. Results have been acceptable but for my Calibra would also be a complete paint, since u had I thought to buy a new gun. I had to spend 80-120€ now, what makes the most sense then? A SATA or DeVilbiss used to shoot by classified ads? Are there any models that can be avoided or rather on another brand? Thanks already for your help