You can trade via a full node, which is the most secure as a local copy of the blockchain is used.
Interestingly, there is even a client shipped that allows trade from the command line. The best thing is, as a buyer you do not even need BlockAze - you can pay via normal transactions from your Electrum Wallet which greatly increases adoption. As long as the transaction fulfills some criteria (easy!) it is then properly parsed by BlockAze and then added to a sellers ranking etc.
You can even run your own market with this tool.
In the darker parts of the web this tool is quite the rage in some smaller communities, as servers cannot be taken down. Here are some images from the above Gitlab repository:
