Realistically your tray is worth less than $100, there is someone right now selling 2010 trays for $70 shipped, and has a few, they are not difficult to find for around $50. The cpu is around $40.
I don't think anyone is going to give you more than $100 after shipping to buy your tray, unless they already marked up the price of their tray to take care of the difference (OWC, for example, will buy your tray for $225)
I don't think anyone is going to give you more than $100 after shipping to buy your tray, unless they already marked up the price of their tray to take care of the difference (OWC, for example, will buy your tray for $225)