Unique sounds are created by brass instruments that work wonderfully for the blues and swing music types. Some brass instruments like the trombone and the trumpet have been around for as long as many of us can recall, in fact dating back as far as Victorian times if not further we have seen brass instruments that resemble the trumpet.
Condition is a major issue when considering buying a used brass, if the previous owner neglected the piece it will show. These instruments need special care, like regular cleaning, and should always be housed in a protective case of some type.
You want to be sure to inspect the instrument properly, look at the color and texture, give it a try to see how it sounds and if each part is fully functional, ask about it’s condition when you talk to professionals as well.
You also need to decide if you would like your instrument to be lacquered or plated, as plated instruments tend to be slightly more expensive but also nicer and of better quality. Choosing a brand and doing some research could also save you in the long run, get familiar with who the leading brands are and what brands are followed by a trail of dissatisfaction and complaints.