buying from a seedbank is not a sure thing i know from experience, sometimes their seeds are not up to par its all about how you grow what you have dont waste time growing banmk seeds first i recommend trying bagseeds first until you get the growing down and then pay money for seeds, i wish i would have done that.
Don't know about that bro, I found that genetics is responsible for 90 percent of what the plant is unless you mistreat it badly...
Bagseeds can be GREAT. They can also suck ass. If you get that bagseed that was made by a slow male or a herm flower, you'll get slow flowering plants or herms, seen it a whole bunch of times in my life. I personally won't risk a bagseed for indoor and rely on it as my only little 'egg'.
Buying from a breeder can be a sure thing if you do your research. Try Mr Nice seeds, cheapest around and their Black Widow is the best Widow on the market, and Shanti Baba (the breeder) is an old head that helped start Greenhouse Seeds and a few other dutch banks too... Seedmakers seeds sell packs for 15 USD, and the Critical they have is a no-brainer to grow, yields like a mofo and stinks.