I have some Mega/EX/M-EX cards I'm looking to get rid of but I do not know how to go about pricing! I've been on my phone searching all day, done help would be greatly appreciated.
http://shop.tcgplayer.com/pokemon
This site is generally used by card players to determine good prices. Use it as a guideline so you don't get ripped off, but remember that the price ultimately comes down to the buyer.