I suspect this person is trying to sell stolen gear (user name Gabe_harr). He has listed a brand new AAD, brand new Main canopy and a brand new reserve. He has only been on the site for 2 days. He doesn't show any knowledge of parachute equipment. He has blocked out the serial numbers of all the items he is selling.
SABRE2 by PD - Main Canopies - Dropzone.com
OPTIMUM by PD - Reserve Canopies - Dropzone.com
Vigil Cuatro AAD - Aads - Dropzone.com
I hope I am incorrect, but the ads are just too suspicious.