When looking at the sheets on Uncut Sheets in order to check individual card rarities, I noticed two things about the commons sheet: All 20 commons appear six times on the sheet
CGC 3.5 and 3 / Very Good + and Very Good: One moderate crease or more than one light crease is allowed, along with rounded corners, scuffing, scratches, moderate edge wear, and loss of original gloss
The Washington State Card Show will offer the collectors, investors, and hobbyists a show focused on Sports Cards, Pokmon, Magic, Other CCGs/TCGs, autographed collectibles and memorabilia
The safest method, however, is authentication by a card grading company