I want to hire some article writers to post 150-300 words posts on new songs that were just released.

How much would be a fair price?

Considering they should not spend more than twenty minutes for a post..

Usually, the rate for writing an article depends on the conversation you and the writer. I got a writer $2 per article 300-400 words regardless whatever the topic she will write..

$1/100 words is the reasonable price...

i'll charge u $3 for article 200-300 words

The going rate for a decent quality article would be around $1 - 1.50 per 150 word's I'd say.

Normal market price is 5$ per 300 words of Good writers
Some writers charges 3$ for 300 words but quality matters .
If you are thinking you will get good quality in cheapest prices this only occurs 1/100 .

If u want a quality freelancer, dont go below 4$

Those rates are low, if somebody contacts me and wants me to write them an article, I charge no less than $75 per article. But you could say i'm an authority in my niche.

I would say $3 for 300 words is a reasonable price.

I would say $1 per 100 words

$2 is good rate for 400 word article. You can go as high as $5 for SEO Optimized and No grammatical error article.

$1 for 100 words is a good compensation already and it will attract more good writers

I pay something like 0,80-1,00$ for 100 words

It will depend on the quality because if you get quality contents you will have to pay more than $3 per 300-400 words otherwise normal will be $1 per 100-150 words articles.

you should pay like $3 - $5 for 300 words depending on on the quality of the article

Economy is bad, thus people are willing to work for lower pay. I've found quite a few native English speakers who write for $5 per 500 word article. Haven't found cheaper than that though (native English speakers/writers).

$5 is a good price.

Does anybody know any good website that pay for you to write articles and actually pay?

The general ratio is $1 per 100 words. Since your project seems relatively simple and a writer could easily BS the information, you might be able to find a better quality writer for the same price.