Laptop sale. How much value? MSI GT72 2QD Dominator?

I would like to sell my laptop, but unfortunately I have no idea how much it still has.

Specifications:

MSI GT72 2QD DOMINATOR

PROCESSOR AND CHIPSET

4th generation Intel Core i7-4710HQ processor (up to 3.60 GHz with Intel Turbo Boost Technology 2.0, 6 MB Intel Smart Cache)

Intel HM87 Express

RANDOM ACCESS MEMORY

24GB DDR3-1600

HARD DISK

HGST Travelstar 7K1000 1TB, SATA 6Gb / s (HTS721010A9E630)

256GB M.2 SSD Raid 0

DRIVE

Samsung SN-208FB, Slim, SATA, multi-standard DVD / CD burner with DVD-RAM and dual layer support

Multi-card reader for SD / SDHC / SDXC memory cards

SCREEN

43.9 cm (17.3 ") anti-glare (matt) Full HD display (1920 x 1080 pixels) with LED backlight and wide view technology (IPS)

Integrated HD webcam (30fps @ 720p) and microphone

GRAPHIC

NVIDIA GeForce GTX 970M graphics with 6.0 GB GDDR5 VRAM

AUDIO

Stereo + subwoofer (Sound by Dynaudio) with Sound Blaster Cinema 2

microphone

7.1 channel sound analog + SPDIF, gold-plated connection sockets

COMMUNICATION

Network controller Qualcomm Killer e2200 PCI-E Gigabit Ethernet Controller (NDIS 6.20) (10/100/1000 Mbit)

Wi-Fi killer; N1525 network with 802.11 ac / a / b / g / n

INTERFACES

6x USB 3.0 (downward compatible to USB 2.0)

1x HDMI (v1.4)

2x Mini DisplayPort 1.2

1x LAN (RJ45)

BATTERY AND POWER SUPPLY

9 cells Li-Ion with 7800 mAh / 87 Wh (permanently integrated)

230 watt power supply

KEYBOARD

SteelSeries gaming keyboard with color programmable 3-zone lighting and SteelSeries Engine Touch-Pad Multi-Touch (108 x 61 mm)

How old is the device and what did it cost new. The rest of the Hhomework is not entirely unknown to me… Almost matches my GS70 ^^

It once cost 1849 euro and is just over 5 years old

Depending on the condition, I think it would still be 200-300 euro. Maybe a little more. Unfortunately, the devices have a very high loss of value, which they can't be upgraded. It is quite well equipped, so a little more could go, there's a lot about negotiation.