At $45 this is a budget listing; the maths still has to work, and it works when the page is topical and the host is active.
Educational publications keep their pages for years, which is the main reason to place here: a genuinely useful admissions or study guide is consulted on the same dates every academic year, so a link inside it keeps being crawled long after a news article would have decayed. It also means the bar is set by the site's own reference-style content, and a thin promotional contribution stands out badly.
Within the Education section of the index — 30 listings, 54 median DA, 3.1k median traffic, $40 median price — this placement is 12% above the median on cost and in line with the index median on audience. Listings in that section range from $20 at the cheap end, so the question is not whether $45 is high for a link, but whether it is high for this one.
Also expect strict link limits, usually one, and frequent nofollow rules on institutional sites. A 52 DA educational page with 5.8k monthly visits is worth having in your profile for plausibility and citation, and you should not expect it to shift a competitive keyword on its own.
The index lists this property's editorial links as followed. Availability of a followed link changes with the site's monetisation decisions, so we confirm the tag on the live URL before counting delivery.