In fact, most sites do not meet the stated indicators, as the forums are on the subdomains and inherit DR from the main domain, but the forums themselves with zero visits, so with the real DR 61 point such in life cannot be. Only 2 out of 10 forums real DR 50 and 36 points respectively.
In total, for 15-20 UAH. Such links could be OK, but not for 40-50 UAH - work on the forum base.

In this case, the link from the forum with the DR 10 points will be somewhat more effective than the forum with the fake DR 60 points.