NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!!!!! (Ok, maybe, but in your case you might try to find one in a shop and have it vetted by having multiple people try it.) At your stage of the game, the ability to hit higher notes is not going to be dependent too much on the horn, it's going to be more about your level of development. Most players with developed chops might have to work a tad bit harder on a bad horn in the range from G to 2nd ledger C, and they will notice if a horn starts to close off or feel stuffy in the upper register, but a lesser developed player might never know the difference. For the amount of money you are looking to spend, finding a solid used student model horn from Getzen, Yamaha or Holton might be a decent way to go, and sometimes even an Olds Ambassador or King Cleveland student model might be decent horn to cut your teeth on.