For Sale: your listing will appear in all search results and buyers can message you.
Sale Pending: your listing will appear in all search results but new buyers won't be able to message you - although existing ones will. Sale Pending is useful if you're close to selling your camper. Some sellers will also use this option if they've had enough buyers lined up and don’t want to receive messages from new buyers.
Sold: your listing will appear last in search results and no new buyers will be able to message you. Sold listings are removed from search results after a short grace period.