Closing here. To be clear - this sale is 3 months old and the sale from the last suggestion is about 1 month earlier. By waiting until that went outdated, you are actively cherrypicking, and this is something that should not be done for suggestions of items that rarely sell.

Be wary that this is a last resort solution to avoid having to leave this outdated altogether as the sales are very discrepant, especially considering the previous suggestion was already accepted. Since this sale deviates most from all other sales we've seen, chances are it would be an outlier in reality, but we do not have enough data points to determine that, so setting a range is a solution to include it.

With these, you should look at the time frame the sales happened in, especially if you are going to use a sale that is bordering on being outdated itself. In this time frame, the appropriate range would be 280-500, so if you insist on updating this with a sale this old, that is the range you will need to suggest at.