Posted By:
RickIt could be a nice tool...a tool among many others.
Nothing beats experience...but for someone who its not familiar with a particular set, it could offer some insight into which cards are harder to find than others.
Collectors can really help make this a better tool by simply returning the flips...just wait until you a few and send them all in at once. Good karma anyways.
In the coin hobby PCGS (PSA's sister company) they offer 50 cents per flip as an incentive to return them.
Maybe PSA should do that as well