Consumers are being careful about large purchases but paying up for some expensive products, chief executive says.

Best Buy raised its profit and sales expectations ahead of the holiday shopping ramp-up on Black Friday after a strong third quarter. Comparable-store sales at the nation's largest consumer electronics chain rose 2.

Best Buy is scheduled to report third-quarter results before the market opens Tuesday. Here is what you need to know. REVENUE: The consumer-technology retailer is expected to report $9.58 billion in sales, up from $9.45 billion the year prior, according to FactSet.