QBO - I traded in an old machine on the purchase of a new one. How do I record everything properly?

I traded in my old mini-skid and bought a new mini-skid. For the new machine, I created a new fixed asset account, and a new long term liability account to record the loan, since it is financed. How do I remove the old asset and properly record what I actually got out of it ($5,000, not the $10,000 that it is listed as in its account)? And how do I apply that $5000 as the down payment towards the purchase price of the new fixed asset. (I am assuming that is what I should do, since I did not receive any actual payment to deposit in the bank).