During $2005,$ eBay acquired four different companies. In the schedule below, the acquired companies are listed with the aggregate

purchase price and with the estimated acquisition$-$related costs $($dollars in thousands$).$

eBay acquired various websites when it acquired International classified websites. The excess of the purchase price over the fair

value of net tangible assets and identifiable intangible assets was $$71,771$ thousand $($or approximately $88\%$ of the purchase price$).$

What does this amount represent, and why is this not unusual for an acquisition of this type?