A new clarinet for $300 that's playable and will remain so will be difficult, if not impossible, to find. The least expensive one I know of that's borderline reputable is well over $500.
A used plastic clarinet with a complete mechanical overhaul can likely be had for under $300. You might even find a wood model for that - a Normandy or a Signet would be two of the most likely options.
A used plastic clarinet with a complete mechanical overhaul can likely be had for under $300. You might even find a wood model for that - a Normandy or a Signet would be two of the most likely options.