I have five Pillow turn buoys One orange and 4 yellow (I think the orange faded to yellow)

These are about 4 x4 and look like this link

http://ep.yimg.com/ca/I/yhst-8257825...3_2271_6904359

They are in pretty good shape just taking up space in my storage area. We used them when we were putting on races here in Grand Haven Michigan

Are they worth any thing and is there anyone who might be interested in these