I’m selling my Dixon Polymer D whistle(the all plastic one) I got it a few years ago its quite loud and not a bad sound. It is tuneable, but I’ve notice the upper registers play sharp with the head pulled out, so if you’re looking for a concert pitch whistle this won’t suite you. (don’t know if this is how all dixons are or mine is a flook)
Anyway I’m selling it for $15. So if you want another knock about instrument for playing solo this might be a for you 
I’m also looking to get rid of my Dixon Flute head combo, throw it in with the whistle for $5. This is the flute head for the Dixon Flute/Low whistle combo instrument. So if you have or are interested in low whistle and wanna give the flute a whirl, its a good starter instrument.
Email address is: extremes22AThotmail.com (use @ instead of AT)