Dozens of peer-to-peer networks will allow you to rent-out — or rent — cars and trucks. These marketplaces provide value to both car owners and renters. Owners can often make substantial sums renting out spare vehicles. Meanwhile, renters typically get better rates — and better variety — when they rent from car owners directly.

But to find the best option, specify what you’re renting.

A. Car

B. Truck or Van