a third might get you banned.
Newegg.com sold me an Avera 49" TV which didn't have the features its own manual indicated, sharpness control (necessary if you don't want print with jagged edges) and picture advanced features. Avera confirmed these features don't work. Newegg refused to take responsibility and said it would charge a 15% restocking fee plus shipping. Boycott Newegg.
What other online retailers have a nasty return policy?