I probably should know better than to ask, but whence came this little factoid?
You're absolutely right. I couldn't agree with you more. You should know better, and you don't.
Sure, if what you'd wanted was the info then you could have done a search for the prices. If you'd honestly wanted me to save you some work by my sharing my info then you'd have cut the attitude and simply asked politely.
Someday if you ever get tired of trying to feed yourself off other people's taxes, then you'll go beyond just realizing you should know better. You'll actually know better and behave accordingly.