I saw in a price guide once that my blue compote was worth around $20 or $30.
Fenton has been making glass since 1905 and still make pieces today. They made carnival pieces from about 1905 through the 1920s. These pieces are rare. I dont have a piece that old and have only seen a few locally. However, fenton makes newer pieces using the same carnival colors. If you have a carnival piece that has the fenton logo stamped on the bottom, then it was made after the mid 1970s. That is when fenton started stamping their pieces. If you can see the stamp clearly, there are little numbers under "Fenton". If there is an 8, the piece was made in the 80s. If there is a 9, the piece was made in the 90s. And so on and so forth.......
I hope this gives you a little bit of useful info.