Took in my stack of 16 games and got $150.12 after the bonus and renewing my PUR. Did this with the credit:
Pre-ordered NBA 2K20 Legend Edition for XB1 and paid the full amount.
Picked up Forza Motorsport 6 and WWE 2K19 for XB1
Used the remaining $4.62 + $.44 difference to pre-order NFS: Heat for XB1
Side story: The employee that helped me said that a guy came in with a huge haul of 360 games that he bought at local flea markets for dirt cheap. He the took them to a local game shop and had them rebuffed for $2 a game. His willingness to do all of that netted him around $500 in trade credit and he bought himself a new Nintendo Switch. Gotta respect the hustle when there's a good trade promo going on.