What are the most valuable trumpets to collect?

The most valuable trumpets to collect often include vintage models from renowned manufacturers such as Bach, Conn, and Selmer. Specific models like the Bach Stradivarius, particularly those made before the 1980s, are highly sought after for their craftsmanship and sound quality. Collectors also prize limited editions and trumpets with unique features or historical significance. Overall, the rarity, condition, and provenance of the instrument significantly influence its value in the collector's market.