Used P51 in fair condition, please check pictures. 

Everything is tested working well. 

Processor  Intel Xeon Processor E3-1535M v6 quad core 8 threads 3.1 GHz up to 4.2 GHz 8MB cache

Graphics Intel HD Graphics 630 in processor

NVIDIA Quadro M2200, 4GB memory; supports external digital monitor via HDMI, Mini DisplayPort, or Thunderbolt; Up to 4 displays with 3 external monitors plus system LCD screen.

Max resolution: 3840x2160@60Hz (DisplayPort via Mini DisplayPort cable);

3840x2160@60Hz (Thunderbolt); 4096x2160@24Hz (HDMI)

supports external digital monitor via HDMI, Mini DisplayPort, or Thunderbolt;

supports four independent displays;

Max resolution: 3840x2160@60Hz (DisplayPort via Mini DisplayPort cable);

3840x2160@60Hz (Thunderbolt); 3840x2160@30Hz (HDMI)

Memory: 64GB (4x16GB), 64GB max / 2400MHz DDR4, non-ECC, dual-channel capable, four DDR4 SO-DIMM sockets

Display: 15.6" (396mm) 4K (3840x2160), anti-glare, LED backlight, WVA, 300 nits, 16:9 aspect ratio, 1000:1 contrast ratio, 100% gamut, 170° viewing angle

Storage: 1TB M.2 SSD / PCIe NVMe, PCIe 3.0 x 4, 32Gb/s, please check picture for SSD status. There is no 2nd M.2 tray and 2.5" HDD Cable and Caddy 

Ethernet: vPro model: Intel Ethernet Connection I219-LM (Jacksonville)

WLAN: 11ac+BT, Intel Dual Band Wireless-AC 8265, 2x2, M.2 card

Bluetooth Bluetooth 4.1 wireless, integrated in Wi-Fi + Bluetooth combo adapter

Dimensions: WxDxH: 14.86" x 9.93" x 0.96-1.16"; 377.4mm x 252.3mm x 24.5-29.4mm

Weight: 5.9 lb / 2.67kg

ExpressCard One slot (ExpressCard/34)

Media reader 4-in-1 reader (MMC, SD, SDHC, SDXC), supports UHS-II SD card

Ports: 

Four USB 3.1 Gen 1 (USB 3.0, one Always On), USB Type-C / Thunderbolt 3, Mini DisplayPort 1.2a, HDMI 1.4b, Ethernet (RJ-45), Dock connector

Camera: HD720p resolution, low light sensitive, fixed focus

Audio support: HD Audio, Realtek ALC3268 codec / stereo speakers, 2W x 2 / dual array microphone, combo audio/microphone jack

Keyboard: 6-row, spill-resistant, multimedia Fn keys, numeric keypad, LED backlight

UltraNav: 3-button TrackPoint pointing device and 3-button crystal silk surface multi-touch touchpad

Fingerprint reader: Touch style fingerprint reader on the palm rest

Battery: Lithium Polymer 6-cell (90Wh), please check picture for battery status

AC adapter: 170W slim tip AC adapter

Preload Windows 10 Pro 64