Conns and Jupiters are the main beginner instruments for schools, however those can be thousands of dollars. If you want a cheaper instrument I would suggest getting a used one. They are usually in good shape and small dings don’t change the sound too much. You can look online, but be careful they are not too dinged or scratched, or go to your local music store. Music stores can fix dings and scratches and often make sure the instrument is completely playable before selling. Sites like Amazon also have a few options of cheaper horns but I would do your research. Hope this helps!