$500 is super cheap. Here in Germany, you easily pay above €1000 for an advert in major portals (i.e. Stepstone [0]) for software developers that runs 30 days. There is special (read: more expensive) pricing for all kind of jobs in IT, while unskilled labour adverts are cheaper.

I remember NGO noyb.eu tweeting a couple of weeks back, that they were quoted €4000 to post a fullstack dev advert (which as an NGO they can't pay).

[0]: https://www.stepstone.de/e-recruiting/wp-content/uploads/201... (german)