Hey! This is actually buckleboy's girlfriend- I am a professional cello player and I have recently had a lot of interaction with string instrument specialists in regards to my own cello.
As you say, the instrument is a reproduction and there are millions of violins (some made in the 1700's, some made in 2010!) out there that have "Stradivarius" labels in them in attempts to get people to buy them.
However, it is extremely difficult to verify/appraise stringed instruments-- for example there are many instruments from the current century which look old but are not and there are many instruments from the 1700's which have been very carefully preserved and look almost new. The only way to get a value on the instrument is to take it to a professional luthier (string repair person/string instrument maker) for an appraisal. They will need to look at the different types of wood used, look at the different shape of the instrument's body, the neck, etc. This will probably cost about $ 20-50 but most luthiers will not charge you if they can tell that the instrument is not worth it. Also, bows are often sold separately from the instrument so the bow that is with the instrument probably does not share its origin, though bows are often worth quite a bit of money themselves!
Also, based on the appearance of the instrument in the photos, it is in need of some repairs. A luthier will be able to advise you on the proper steps to be taken to preserve the instrument (either to make the repairs or the best way to store the instrument), regardless of whether or not this is a 1700's violin!
Good Luck with your Violin!
~Diggergrl