The redhotornot website is free to use and allows you to check if items you are about to purchase are stolen.

Users register their items along with serial numbers and if stolen, flag them on this site.
Then when a search is performed for the serial number people can quickly see if it is flagged as stolen.

This works for any items which have a unique serial number such as laptops, phones, golf clubs, or almost anything else.

Just list your items and if anything is ever stolen swipe the slider to redhot. Anyone checking the serial number will immediately be warned. You can also offer a reward.