How to value iMac

[alarustic]

Now that I have a new iMac on order, I have one spare to sell as my old one will go to the kids, it means the kids computer is available. I want to sell it to either my in-laws or a friend for a fair price, but I don't know what it is worth. Is there any website I can get a valuation?

The spec is:
27" iMac (last model before retina, so runs almost silent!)
• 3.5GHz Quad-core Intel Core i7, Turbo Boost up to 3.9GHz
• 8GB 1600MHz DDR3 SDRAM - 2X4GB
• 256GB Flash Storage
• NVIDIA GeForce GTX 775M 2GB GDDR5
• Magic Trackpad
• Apple Wireless Keyboard (British) & User's Guide (English)
• Accessory Kit

Bought new in January 2014 for £1972.80 (had to look out my receipt for the spec!)

 

[MH01]

I'd honestly say, check out eBay, it's a good indicator for the prices .

 

[driftless]

Or, Gazelle.com

 

[Clix Pix]

Family? Why not just give the thing to them? Friend? Depending on how close, either give it to them or charge them a very, very minimal price....

Which is worth more -- family/friend relationships or this old iMac you're wanting to get rid of?