The only difference between low grade mj & high grade mj is how its grown & taken care of,we can split hairs over thc content & yeild but all in all weed is weed & good seeds are good seeds.
You do not have to buy outragously priced internet seeds to grow excellent weed,as long as the bag of weed the seeds came from is good weed you can expect some good weed from that seed strain,taking into consideration that you learn how to grow the right way,invest in some "REAL" grow equipment & dont expect massive ounces of weed from lights taken from around the house you can get excellent pot from bagseeds.
If the "shwag" your refering to isnt even weed to start with there is no way in hell to make it look good.
Who the hell thought up the name shwag anyways,sounds pretty stupid if ya ask me.