PLR should be less expensive than custom articles. By its very nature it is created to cost less by being sold to more than one buyer. However, lately I have been seeing some very cheap PLR articles. I don't mean inexpensive like $1 an article- I mean inexpensive like a dollar or less for four or five articles. How is that even possible? Can you sell it to enough people to possible be worthwhile? And on the buyer's end, is it worth it to buy it?
Your answers: Foreign writers. Yes. No.
The article packs that are priced so low are often written by Chinese, Filipino and Indian writers who write in English as a second or third language. Their articles are hard to decipher and harder yet to use for any marketing purposes. To use them, they must be rewritten by an English-speaking writer. Some buyers purchase the packs and then spend time reading and rereading them in an effort to understand them well enough to rewrite them. Others hire a rewriter to try to do the same.
So, in order to save time and money you buy PLR articles. If you then have to either spend an enormous amount of time to fix them or hire someone else to do the same, why buy them? In PLR as in everything else, you get what you pay for. If you're serious about what you do online, stay away from the bargain bin and go with professionally written content.