You will need to have it appraised. It could be worth a lot or a little, depending on the maker and the condition. Try googling violin appraisers. Unless you live in a large city, you will have to ship it to the appraiser. It’s going to cost some money, but it will be worth it to know what you have.
Do not sell it on ebay. If it is worth a lot, it will need to be sold in a specialized musical instrument auction at a high end auction house like Sotheby’s.
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