Yes, we are limited by transactions that we can find.
Also, there is the range of prices that RR reviews above.
So, with those two things in mind...
POLOP: If you can give specfic examples of what cards you think are priced too high and point us to where that card is being offered or has been sold for the lower price, please do. Bear in mind that if you tell us our high price is too much and then point us to ebay, that's not valid, as ebay would more reflect the Medium price. But we really do want specific feedback!
Prime: You're looking at the High range of pricing. In those cases, you will find those prices in shops and, yes, they do charge that much. Not that we would expect a saavy PokeGymmer to pay that much.
TacC: I'll check the price for that. But note that we have seen many transactions on auction sites for "lots" of playable trainers going for $0.99/set of 4. Or even $0.01!!! These low sales are hard to categorize well. Best to key off of the Medium price, which we feel is more "mainstream".