In addition to trusting you, the buyer needs to bear a 2.5% fee, however, you do not sign the deposit address using PGP.
Since you are acting as an eescrow, what will happen if your cold storage is hacked? Is there a compensation fund? If not, perhaps signing a message with an address containing more than one Bitcoin will be necessary.
The conversation is not conducted via
https://trustee.cash/ so how will the dispute between the two parties be resolved, screenshots can easily be faked.
We will work on making that happening, we are just starting and we are splitting the funds between marketing, branding and working on improving the privacy of our users as that's what is most important to use due to our current users category.
We work our best to provide the best dispute resolution and customer support to our clients with most disputes and tickets been solved in 1 hour max.
We will do our best to provide and assist our clients of course, and we will take in consideration the critics as well to better improve.