Re: Sky Sax
Be careful about how much you spend on repairs without knowing the value of the horn. If it's one of the cheap ones from China like you see on ebay or Amazon, it may have fatal build quality issues. If it's a used horn of obscure provenance with inherent flaws or in bad condition, it may cost more to get it in working condition than the cost of a good used horn of greater value.
If it was supposed to be in excellent condition but it wasn't, its condition was misrepresented to you by the seller. Do you have any recourse?
A solid horn in good working condition is essential if you don't want your equipment to be a roadblock to your learning. Keep your options open.