Thinking about Buying a Chipot Vuillaume Violin,Is this one fairly priced?

chin

well i've been looking for a new violin for over six months now, and i finally found one that i love and really want! it's labeled "chipot vuillaume, gendre de j.b. vuillaume a paris" and the date reads 1886. the shop we got it from doesn't have any papers for it because they bought found it and restored it- it's in great condition and has a gorgeous sound, but i was wondering how much violins by "chipot vuillaume" usually sell for. this one is priced at $7,500 and my parents want to know if this is a reasonable price. my teacher says it's a really awesome instrument, but she isn't sure if it's fairly priced either, and i can't get to a luthier to get an verbal appraisal until monday. do you think this is a fair price? I really hope so because i'm in love with this violin! any help would be greatly appreciated.
picture~thx!