Any thoughts on this?
Why wouldn't you allow your current customers first rights to trading in their orders? They are the ones that have believed in your product and have already worked with you with possible long wait times for the product. I think this is a great way to show your appreciation to your current customer database and a big thank you for believing in your product.
The current customers enjoy mining on current equipment, while a new customer gives money upfront and gets nothing for the wait.
It should just be first come first serve, otherwise it will turn into a Soap Opera.