Hey guys (and gals)...Im new here, and to hockey card collecting and have a question...

I have a couple cards that seem to have errors :

-A Fedorov rookie OPC that says "Federov" on the front

-Konstantinov rookie...Beckett lists 2 cards, one errored...how do I know if mine has an error or not?

In general, are these cards more or less valuable?

**I am a new collector. I was given 5 large boxes full of cards, mostly 90's and Ive started collecting newer since. If there's anything u think I may have that you need or want, let me know, I'll be happy to check.