The main target appears to be caravans, which are stolen overnight.
Thames Valley Police Aylesbury Vale say there are three vehicles of interest to them - a maroon Skoda Octavia, a silver Freelander and a gold Hyundai Santa Fe.
To see the appeal, visit www.facebook.com/TVPAylesburyVale/
You can report an incident to Thames Valley Police online, or call 101. Call 999 if a crime is in progress.