re you interested in the big boy rig? call me 386-837-8279
The user is unlikely to see this status. You have to send a personal message to the other user. If he emailed you, then it should be in the email that dz.com forwarded to you. If he sent you a personal message, you can use that. If you're on a computer, the personal message is up in the top right, with the little envelope icon. If you're on a phone, go to the upper right, the parallel lines icon, and the envelope is a sub-icon under that.
Because you have your phone number in it, I'm not going to make this status open, because it would get shared with every user on dz.com.
Another option for selling gear might be the FB skydiving gear group, if you do FB.