Up in Maine I'm sure you're buying crap, BUT, Mexican pot can be and is some of the best you can get your hands on if you know your source, which is no different than buying any other product in your daily life. We used to buy Mex weed here in Texas that was so strong it would put you on a 30 minute psychedelic trip. I've said it a million times, that seed in the bottom of the bag might be the next Haze staring up at you.
I now have some Mex weed and it's fine looking nuggets with a very nice, fresh aroma.