At $50 this is a budget listing; the maths still has to work, and it works when the page is topical and the host is active.
The commercial temptation is exactly what the guidelines punish: promising outcomes. Write about process, access, cost and design, keep treatment claims inside the evidence, and never put a promise in the anchor. That constraint is also why health placements hold value better than most categories, the surviving pages are the careful ones.
Within the Health section of the index — 37 listings, 54 median DA, 4.9k median traffic, $40 median price — this placement is 25% 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 $50 is high for a link, but whether it is high for this one.
Where a site in this group carries 6k visits a month, expect the editorial desk to check whether your brand has any existing footprint: review profile, registration with the relevant professional body, a physical address. Those checks protect their own standing, and passing them quietly strengthens yours.
Our observation on this host is do-follow outbound links in editorial content. That is the attribute, not the value: the 55 DA and 6k monthly visits are what the attribute is attached to.