Pricing on the power keepers charizard

Hey all, first off I want to know if this card is real and secondly, I notice on the collectr app this card lists about $276 raw but all over the internet I see people asking $140-$160 and I have no idea why?

Any insight on this would be helpful. This card is listed in that range as well as 10-20 others.

I’m very new to the tcg. Thanks.