Yamaha's student model is a good beginner's slide trombone. I found one in a thrift shop for $30.
Slide trombones are easy to qualify. If the slide move freely with no hitches and the tuning slide is not frozen, the instrument should be okay.
Slide trombones are easy to qualify. If the slide move freely with no hitches and the tuning slide is not frozen, the instrument should be okay.