Autoflowers have been crossed with a non-potent cannabis species, Cannabis Ruderalis. If someone sells autoflowers at the market rate without disclosing it, they have ripped off the buyer. The quality of Ruderalis hybrids is greatly diminished when compared to purely Indica/Sativa hybrids, across virtually all aspects of the end product: potency, structure, yeild, flavor, smell, bag appeal, etc.
If you're not a heavy consumer and want something that is low maintenance for outdoors thats just for you, then you might consider autoflowers. But if you like it strong or you plan to market it, I strongly suggest leaving the Ruderalis out of your genetics. If you are growing indoors then it really makes no sense to grow autoflowers, because you are already able to control the photoperiod, and thus can make the plant flower as soon as it is sexually mature, just like an autoflower, if you desire.
Cannabis Indica and Cannabis Sativa are the cannabis species that produce the psychoactive effects that are most desired by consumers. Autoflowers have been adulterated. It is pseudo-marijuana; quasi marijuana at best. THC% is not everything, and even on that front the leading photoperiod strains are crushing the leading autoflowers.
Cannabis Ruderalis is not photosensitive, and thus it is crossed with indica/sativa hybrids to create autoflowering strains. Unfortunately, along with the autoflowering characteristics of the Ruderalis, comes the diminished quality discussed above.