Single-sale suggestions for new items are always left open to see if we get more data, as to ensure we do not price things based on outlier purchases.

Just take a look at the sales here; do the sales here look like this value is reliable? It obviously is not; ranges this big are almost never truly accurate. This is actually the absolute maximum range we would allow (high end 2x the low end), which is a last-resort solution on items that - based on the sales - should really not be priced, but for which we provide a makeshift solution to accomodate collectors and the like. Before we allow such extremes, we want to be as sure as possible that there is no more accurate representation. This is why we leave suggestions like these open for a longer period of time.

Also your statement is false - when something becomes outdated on a suggestion while we are waiting, we grant leniency towards the 3 month threshold - if the suggestion ends up being fine as it is, we still accept. If there is a resuggest value that would have been fine at the time it was first suggested, we still accept them even if the oldest sales are now outdated, to combat the exact issue you are complaining about.