The other day I ordered two Seagate 250GB SATA drives from Newegg.com for $79.99 each, but I forgot to use the BUYBARRACUDA discount code which takes $5 off the order. I contacted Newegg Customer Support via their web site and told them that I've been a customer since 2001, plus I've spent over $1,000 at Newegg, including the $1,000 order where I bought the drives.
A few hours later, they emailed me back telling me that they'd refund $5 to my credit card! Thanks Newegg!