that sounds like a fair price......
im not sure what it means when ur anemone has a mushroom shaped foot but i know they can take in and let out water as they want making different kinds of shapes.... i woulnt worry unless u see that its mouth is opened up all the time it loses its coloring and when they are really doing bad they expel their inards through their mouth that pretty much means there dead....
u should probably leave the anemone be since they can move around on there own anyways.... most times they wont like where u put them the first time unless you have good lighting in the tank.... by the way what kind of lighting do you have over your tank???