Historically, products sold door to door will be of the same variety that can be purchased at large discount stores. The products accounting for the largest share of direct-sales revenue include cleaning supplies, cleaning equipment, appliances, magazine subscriptions, and home improvement products. The largest subset of these would be the home improvement products/services where items sold could be new or repaired roofs, siding, new replacement windows, and decorative stone. As of 2008[update] the business model of many companies that participate in this type of direct marketing has changed with the growth of the Information Age. Products sold like import door to door are now more likely to be more etheric or subtle in nature: such as sheets of coupons to events or local businesses, season tickets to local professional sports teams (both of these are known in the industry as "Cert [or certificate] Sales", or subscriptions to home television services or broadband internet services. Telecommunications companies like Verizon Communications (FiOS), Comcast (Cable television and internet) and AT&T (U-verse) all contract with various marketing companies for nationwide sales fulfillment at the residential level. While the older model of the salesman carrying a bag of goods on his shoulder to sell to the public still can occasionally be seen, the majority of today's salesman specialize in the newer field of account execution or literature distribution.
In many countries, encyclopedias, including the Encyclopædia Britannica, were frequently sold by door-to-door salespeople, although this practice has also seen a decline in recent years.