A 39 DA listing at $80 is the price of an experiment: if the article earns citations, you have found a channel; if not, you have lost one invoice.
Generalist inventory also varies more than any other kind, which is why the numbers in this brief matter more than the label. A 39 DA domain with 33.5k estimated monthly visits and Do-follow links is a different product from the same DA with a tenth of the traffic, and they are priced too close together in most catalogues.
blogsfeeds.com has 50 DR against an index median of 51, 33.5k monthly visits against a median of 5.5k, and a placement price of $80 against $70. Where those three numbers point in different directions, the traffic figure is usually the honest one: it is what a publisher has to protect, and it is what decays first when a site starts selling too much inventory.
Where blogsfeeds.com is not a topical match for your market, buy it for that plausibility and for whatever brand exposure comes free, and put your exact-match anchors on the sites that genuinely cover your subject. That one discipline is the difference between a general guest post strengthening a profile and the same link making it look synthetic.
Our observation on this host is do-follow outbound links in editorial content. That is the attribute, not the value: the 39 DA and 33.5k monthly visits are what the attribute is attached to.