Used P53s in good condition. P53s is same as T590 just add dedicated GPU P520 with 2GB DDR5 display memory. Warranty until including ADP and battery.
Everything is tested working well. No dent no scratch.

Processor 8th Generation Intel Core i7 Processor i7-8565U quad core 8 threads 1.8 GHz up to 4.6 GHz 6MB cache
Graphics Intel UHD Graphics in processor and NVIDIA® Quadro® P520 Discrete 2GB GDDR5, supports up to 3 independent displays via native display and 2 external monitors; supports external monitors via HDMI®(up to 3840x2160@30Hz) or USB-C (up to 3840x2160@60Hz)
Memory: 16GB DDR4, 8GB memory soldered to system board, 8GB in one DDR4 SO-DIMM socket, maximum 40GB
Display: 15.6" (396mm) FHD (1920x1080), anti-glare, LED backlight, WVA, 250 nits, 16:9 aspect ratio, 700:1 contrast ratio, 45Color Gamut 170° viewing angle, no white spot, no scratch
Storage: 512GB M.2 2280 SSD PCIe NVMe, PCIe 3.0 x 4, 32Gb/s, please check picture for SSD status
Ethernet: vPro model: Intel Ethernet Connection I219-LM (Jacksonville)
WLAN: Intel Wireless-AC 9560, Wi-Fi 2x2 802.11ac + Bluetooth 5.0
Bluetooth 5.0 wireless, integrated in Wi-Fi + Bluetooth combo adapter
Dimensions: WxDxH: 14.40" x 9.76" x 0.75"; 365.8mm x 248mm x 19.1mm
Weight: 1.75 kg (3.87 lbs);
Media reader: MicroSD card reader

Ports: 
Two USB 3.1 Gen 1 (one Always On),
one USB 3.1 Type-C Gen 1 (with the function of Power Delivery and DisplayPort),
one USB 3.1 Type-C Gen 2 / Thunderbolt 3 (with the function of PD and DP),
HDMI 1.4b, Ethernet (RJ-45), nano-SIM card slot (WWAN models),
headphone / microphone combo jack, optional smart card reader,
microSD card reader, side docking connector, security keyhole

Camera: 720p, with ThinkShutter, fixed focus
Audio support: HD Audio, Realtek ALC3287 codec / stereo speakers, 2W x 2, Dolby Audio Premium / dual array far-field microphone, headphone / microphone combo jack
Keyboard: 6-row, spill-resistant, multimedia Fn keys, numeric keypad, LED backlight
UltraNav: TrackPoint pointing device and buttonless Mylar surface multi-touch touchpad
Fingerprint reader: Touch style match on chip fingerprint reader on the palm rest, anti-spoofing technology

Internal battery: integrated Li-Polymer 57Wh battery, supports Rapid Charge (charge up to 80% in 1hr) with 65W AC adapter
AC adapter: 65W USB-C AC adapter

Preload Windows 10 Pro 64, you can free upgrade to Windows 11 Pro.