1] Apple MacBook Pro MF839LL/A 13.3-Inch Laptop with Retina Display $900
(bought in July 2015, in very good condition)

(2.7 GHz Intel Core i5 Processor, 8 GB RAM, 128 GB Hard Drive, OS X El Capitan)

Style: 13.3-Inch
2.7 GHz Intel Core i5 (Broadwell) 8GB of Onboard 1866 MHz LPDDR3 RAM
128GB PCIe-Based Flash Storage Integrated Intel Iris Graphics 6100
13.3" LED-Backlit IPS Retina Display 2560 x 1600 Native Resolution
802.11a/b/g/n/ac Wi-Fi, Bluetooth 4.0 Thunderbolt 2, USB 3.0, HDMI
Force Touch Trackpad Mac OS X 10.10 or 10.11
Non-Removable Lithium-Polymer Providing up to 10 Hours per Charge

2] Apple Magic Mouse 2 (MLA02LL/A) price ~ $50
(almost new, bought in January, used for 2-3 days only)

It's lighter, has fewer moving parts thanks to its built-in battery and continuous bottom shell, and has an optimized foot design - all helping Magic Mouse 2 track easier and move with less resistance across your desk.
The Multi-Touch surface allows you to perform simple gestures such as swiping between web pages and scrolling through documents.
Magic Mouse 2 is ready to go right out of the box and pairs automatically with your Mac.
Bluetooth-enabled Mac computer with OS X v10.11 or later
Wireless Bluetooth Connectivity
Built-in Rechargeable Battery, Lighter in weight
Optimized Foot Design

if you are interested for both, ∑ price is $930