WTB - Clipless pedals and shoes - CHEAP

I am currently riding a mountain bike with platform pedals, but would like to upgrade to clipless.  I know nothing about clipless pedals, so I am looking specifically for a complete set-up of pedals, shoes and whatever else is needed.  I am a size 8.5 to 9.  I would prefer something that you are willing to part with at a cheap price as this is something that I just want to try and see if it is for me.  Don't want this to be a big investment.  I don't care if the shoes and cool or not, dirty or not ripped or not.  At times I wear moccasins when I ride with the family, so I am not proud.........yet, wait until I have clipless pedals.