If you want to use them in soups, stews, etc you could always slice the up and lay them out on paper towels to dry. Once dried place in ziploc bags and freeze. They can even be thawed in water (which rehydrates them too) and used as pizza toppings. We often find marked down shrooms (losing their nice appearance) at our grocers and this method works well for later use at a MUCH lower cost.
Do I smell SMOKE?????