My viola is worth about $2,500, but it may be worth slightly more now; it's sounds a lot better than when I bought it about 5 months ago. I was very lucky for that one to be my very first viola that I've owned.
I also own a violin (the family violin), and that one I'm not so sure about. The strings are old, but when I play it, the sound is huge (somewhat like my viola, but less

). I had to buy an E-string to replace the old one, and I plan to buy the rest of them when I can afford them.