I never charge anyone to enter any of my at-cost drawings. Anyone who wants a certain pin just has to post in my thread that they want to enter for that pin, and I create a list with everyone's names. Once I have the pin, I randomly choose someone from the list to purchase that pin at cost. I pick up as many pins as I can before they sell out or until everyone on the list gets one. It's never a guarantee (I always go by myself so I can only pick up one of each pin per day), but you at least have a chance. I only charge people the amount it would cost them to pick it up in person (so the actual pin cost, tax, and parking fee - it's never free to park in Hollywood unless you get REALLY lucky - but my parking fee is only $2 per order regardless of how many pins you order), plus shipping.
For the pins you're looking for, I have the signup list open for the Stitch bow. I will let you know that the first Stitch pin I am able to get I am keeping, but if I am able to get any extras I will be selling them in my thread. I don't have signups open for the mice pins yet, but once DSF announces them as an actual release with prices and release date, I will open the signup list and you can enter for as many of those as you want. I will be keeping the first Robin Hood Churchmice and Rescuers pins I get for my collections, but I will most likely put the rest up for random drawing. And any extras I can get of the ones I keep I will also sell at cost.