Many factors will determine the value of a frog.

1. Edition Size

2. Condition of the piece

3. Special traits such as: Full Signature, Enjoy, Numbers, COA included, Age, Color, and of course, Popularity

I've tried to establish a good recollection of previous auctions and private sales. Feel free to ask me for an estimate on the value of any piece you may have or that you might be looking for.