Here is a top notch alto designed by Branimir Slokar and Kühnl & Hoyer. It is so good, it has unfortunately served as model for all the chinese alto trombones on the market now. But this is the original, and you can tell it! A great alto with a nice sound and really easy to play.
This one is in pristine condition: Looks like new and plays like new! New those altos go for 2700$. Get yourself a basically new alto at a drastically reduced price!