If it has good intonation and plays well, then that's a good sign. Even some well-known brands don't always measure up to that test! The risk is longevity. It might be ok for now, but might not last a very long time. It might, though. It is very possible that the horn is the same make of some other brand - likely a Chinese import. Just be aware that if it's a no-name horn that it can be very difficult to resell so don't pay very much for it. You might want to consider a Selmer Bundy II or Yamaha 23 as they are good quality affordable instruments.