I am in the market for a cheap single trigger bass trombone. Kicking myself really because I did have a Yamaha YBL 322 which I got rid of thinking I wouldn't need it. I am after suggestions; it would only be for use on marches and other outside jobs. Does anyone have any experience of the cheap chinese copy type trombones? It must be a single trigger whatever. Or alternatively does anyone have one to sell? Thanks!