Why the same card sells for different prices

You find two completed sales of what looks like the same card. One went for double the other. Before you decide which is right, work out which of these is happening, because in most cases neither sale is wrong.

They were not the same card

This is the most common answer by a distance. Parallels share artwork, and photographs flatten the finish that distinguishes them. A refractor and a base card can look identical in a badly lit listing photo.

They were not in the same condition

Raw cards carry an unpriced risk: the buyer is judging corners and centring from photographs. Two raw copies can genuinely be worth different money, and a graded copy is a different product entirely, covered in what grading does to the price.

One was an auction and one was a fixed price

An auction finds what the most motivated bidder will pay on a given evening. A Buy It Now is one seller guessing and one buyer accepting. Neither is more valid, but auctions tend to find the market and fixed prices tend to bracket it.

The timing was different

Cards move on news. A hat-trick, a transfer, a long term injury, a call-up. If the sales are weeks apart and something happened in between, that is not noise, it is the market repricing.

The listing was different

The same card sells for less with three dark photographs and a title missing the card number, because fewer people found it and fewer of those who did could tell what it was.

One of them was an outlier

Sometimes two people wanted the same card at the same moment and the price says more about that evening than about the card. This is why the method in how to price a sports card reads the cluster and not the peak.