You'll get the best price selling to an individual, not a store or pawn shop. Since the condition was too poor for the store to accept and clearly needs some work due to the "mould", you could probably expect $100-$300 for an old Bundy depending on type (alto, tenor, etc.). If you google "Bundy Alto" on craigslist, you'll find many listings of ones in good condition going for around $100. A store would give you a lot less than that. If it were my horn, I'd just give it to a school.
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