Honestly, Yeah he was WRONG to just GIVE away your stuff... however.. I think you are a bit more mad than the sitution calls for. You didn't use it, and $300 is not going to make or break your life. Pick your battles and I think this one is not worth the battle. You & your husband are very kind and generous people... someone who is going to use it is thanking the two of you right now very much for giving it to them!
Remember girl, what goes around comes around