. >> reporter: shoppers like deion morgan stocked up on half- off holiday supplies, while others werehrilled to learn they could use gift cards to nearly anywhere here. >> it's pretty cool. >> reporter: wal-mart is testing an online gift card exchange, allowing customers to turn unwanted gift cards into wal-mart e gift cards that can be used in stores and online. >> i guess it would be more of a convenience since i'm already shopping here. >> reporter: a wal-mart spokesperson said more than 200 retailers and restaurants could be exchanged for up to 97% of the original value. >> still bothers me a bit just because it's not the full value. >> reporter: a move this big- box store is trying to further boost its bottom line this holiday season. >> groceries, now this, right? i guess, yeah, they are trying to connect to the masses. >> reporter: wal-mart's test gift card exchange program will run for several weeks. we'll put information on our website, ktvu.com. melanie woodrow, ktvu channel 2news. >>> new details on a head-on collision outside sacramento that left four people dead. the chp