To clarify on the comment left there:

if you can make it plausible it sold for its BO through compares (which is the case here) you can use it.

When you rely on bot.tf statistics it is important that you try to find the sales through compares to ensure it did not sell for items or for less in pure, especially when it is a single sale that determines your range (i.e. just linking a bot.tf page with 1 sale as a whole suggestion does not work). If you can find the compares and can find the right amount of keys, it is very likely it sold for that amount (in this case they probably dont match because the buyer bought the keys beforehand).

On that same note, if you have several bot.tf sales at the same value, it is very likely that one or more of them actually sold at that value, so we are more lenient in such cases.

As for this suggestion, Im going to accept it here to save you the hassle, but it is something you can keep in mind in the future.