Looking for Tutors/EDH staples

I need a few cards for my EDH deck.  I am looking specifically for

1x Enlightened Tutor
1x Mystical Tutor
1x Demonic Tutor
1x Sol Ring

I'm only interested in the Revised/Mirage editions of these cards (aka the least expensive editions) valued at that specific edition's average price at TCG.  Check out my tradelist and set up a trade!  I'd prefer to do this within Canada but US is fine too.