Make More Profits From a Static Product Line

This needn't be expensive. What types of upgrades are available to motivate customers to buy right away? Perhaps there's a special paint they can select, or a protection plan or extended warranty. Or maybe you can apply the customer's logo or name to the product.

Offer additional services including free scheduled delivery as well as free set-up/assembly. Even just offering a solution such as "certified contractors available in your area" reduces the purchasing barrier, because you've offered a solution.