Has Minecraft ever been on sale?

I don't really want to pay full price for it, because I will only play it sometimes. I also want to know when they do have a sale. Any info would be great thanks. I've played before on a friend's account who has been telling me to get it.

It was on sale the entire beta/alpha stage. It will no longer be going on sale.

Have a few bucks to spare try minecon they randomly give free copys