Brands to look for when shopping for a Trumpet (PLEASE NOTE: this list does NOT contain all brands of Trumpet makers, this list consists of brands that a few of us directors have worked with and have personal experience with. If you are considering a Trumpet that has a brand that is not on this list, contact your director, or even better, contact your local instrument repair tech and see if its a brand that can be worked on)
Brands we have had success with Yamaha Conn or Conn-Selmer Jupiter Getzen Selmer Elkhart Olds King Bach Ambassador Blessing
These videos come from the "Dr. Selfridge Music" YouTube channel.
He has many more for this instrument check him out! :)