This sale is probably an outlier. I've made a notion on the rebel suggestion; it was marked as NFS when it was purchased, which is why it was accepted (as we expected not to get any new sales; we decided to accept the collectors purchase as is). Now it is used to pay for this, which is very close to in-date, and has another sale far lower (quite sure its not actually 75, but that it is far below the suggested value).

Since both sales have an indication that they may be an outlier in the case posted here, I would say that this is best left outdated on account of the sales being too discrepant.

Closing here based on my original comment.