I think it's a very expensive price of$ 10 for 500 words.
So it turns out an article on the site of 2000 characters, it will cost me $ 40/ I do not earn so much a day that you would pay such amounts. I wouldn't risk buying at that price.
You're right. Topic starter, go to any freelance exchange and make sure of it. Copywriters take for their services 2-3 $ per 1000 characters without spaces. 500 words is about 1500-2000 characters. It turns out that the price for an article of 500 words should be 4-6 $, but not 10$