I'd check around for references on the particular model before getting too excited over the value. They aren't all valuable just because of age, though condition is a major variable, and our limited glimpse of your piano shows an instrument that may have had pretty acceptable humidity conditions over so many years.
Otherwise the cost of restoration can often be worth more than the value of an old piano. Factors include a complex and aging pneumatics system for the "player" element. The condition and uniformity of the felts on the individual actions for the keys. The condition of the soundboard, and whether the pinblock is still viable (else retrofitting oversized tuning pins or some other immensely costly repair), and so on.
At the very least an old piano usually needs a few tunings to get back to stable condition, providing it's even capable of that.
By the way, I used to sell pianos, but that and 50 cents will get you a cheap cigar
Edit: On the other hand some of the rolls can be worth a fortune, so be sure and search them carefully!