Like any other collectable it is worth what someone will pay for it. Now, that being said, have you had it looked at by a professional to be certain that it is jade? I had what I thought was an extensive collection, until a geologist friend came by and identified only five pieces as authentic jade. Most of it was soapstone and didn't even pass a hardness test. If your piece is authentic, it appears to be from China and about 100-125 years old, Ching dynasty. While the carving is good, it's not excellently finished, so would not bring top dollar at auction. Probably less than $100, but one never knows what can happen at an auction. Check out postings on Live Auctioneers and get an idea what similar pieces go for. To qualify for perusal of their 'sold' section you have to join, but it's free and nonintrusive.
p.s. understand I'm not an expert.
