I was just taking a look at a demo. One thing that I have found very useful is he has added a simple API integration for your unlock code supplier.
I just tell the system, through settings, what type of API it is, my account and the API key and voila!
Now, when I want to sell an unlock I just search the unlock service as I would if I were on our unlock code suppliers site, add it and it automatically submits it with the IMEI I have recorded on the customers ticket.
It tracks my balance with my provider, tells me my cost of the unlock and allows me to set a price.
From their system I could potentially never have to log into my unlock code providers site unless I have administration to do or to add funds.