Yeah they are junk. A blind man can see that. For those who say "maybe that's all someone can afford," I'd argue that if a $75-100 is all someone can afford and the genuinely "need" a firearm, that person would probably be better served with a break barrel single shot shotgun (think H&R or Rossi) loaded with defensive loads vice a junker that shoots .25ACP. Better yet, that person would probably be best served by saving their money as while I like and buy guns like hot cakes, they are commodities and not necessities. If I only had $100, I'd be saving that money for food or pocketing it until I had some money which afforded me the opportunity to choose between a $100 junker and a $300 reliable handgun.
I'm sure someone will say that some people "need" a firearm for self-defense because they live in the ghetto and while that may be true of some, I'd submit that most guns are bought out of interest and want rather than genuine fear of having to defend one's life. So yes, while there might be some people with a legitimate "need" for a firearm for self defense, and a $100 Saturday Night Special is all they can afford, those people are the exception and not the norm.