Pokemon Cards - Is there a price guide?

My eight year old son and his friend are "into" Pokemon cards. Not playing - just lookng at the card values and making trades. When he found out that my nephew had a whole collection he was in awe. My nephew thinks he has some high value cards and wants to sell them. My nephew knows I sell extensively on eBay and wanted me to do it.
My expertise is football cards not Pokemon. I don't know anything about them. I have looked at Wal-Mart and Borders in the magazine section for a price guide/information guide so I can figure out what he has and how much it is approximately worth but can't find one. This indicates to me there is not much of a market. Does anyone know if a price guide exists? Is there a good information book out there? Are Pokemon cards worth anything?
Any help would be appreciated.
My expertise is football cards not Pokemon. I don't know anything about them. I have looked at Wal-Mart and Borders in the magazine section for a price guide/information guide so I can figure out what he has and how much it is approximately worth but can't find one. This indicates to me there is not much of a market. Does anyone know if a price guide exists? Is there a good information book out there? Are Pokemon cards worth anything?
Any help would be appreciated.
WANTLIST
1992 Topps FB Golds (72% complete)
1997 Topps FB Minted in Canton (10% complete)
1999 Topps FB Record Numbers Gold (80% complete)
2001 Topps FB MVP Promotion (35% complete)
1992 Topps FB Golds (72% complete)
1997 Topps FB Minted in Canton (10% complete)
1999 Topps FB Record Numbers Gold (80% complete)
2001 Topps FB MVP Promotion (35% complete)
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Comments
R73 1933 Goudey Indian Gum - Series 288 - Nos. 118
Also looking for 1953 Parkhurst & 1953 Quaker Oats Ripley's BION.
If you have any available for sale PM me
www.pojo.com also has prices, but they are way-old.
Probably the best price guide - and since you said you sell on e-bay - is e-bay itself. Just look at completed Pokemon auctions.
Contrary to what others have said, the cards still sell. I only deal in the first 3-4 sets, but I don't have problems getting rid of cards!