Refurbished iMac 21.5" 2017 512GB Silver, 8GB memory
£342
Lowest Fair price 
Back Market
- 1‑year warranty
- 30‑day returns
- Free shipping
Sellers pay us a commission. It never changes the order. Is RefurbMe free to use?
More offers, any condition, cheapest first
Prices checked 26 Oct, 3:57
Other iMac 21.5" versions
Storage
- iMac 21.5" 3Ghz Intel Quad-Core i5 7th gen, 256GB SSD, 8GB memory, from £261
- iMac 21.5" 3Ghz Intel Quad-Core i5 7th gen, 512GB SSD, 8GB memory
- iMac 21.5" 3Ghz Intel Quad-Core i5 7th gen, 1TB Hard Drive, 8GB memory, from £420
- iMac 21.5" 3Ghz Intel Quad-Core i5 7th gen, 1TB Fusion Drive, 8GB memory, from £249
Memory
Not buying today? Get an alert under £320
Refurbished iMac 21.5" prices today
£342 is a low price for an iMac 21.5" in Fair condition.
Since 9 October, the lowest price in Fair condition was usually £343 to £364.
2 offers from 1 seller today, £342 to £364.
What Excellent, Good and Fair look like
The grade describes looks only, as each seller grades it. Every seller here gives a 1‑year warranty. Each seller words its own grades, so here is what each seller calls it.
From £364 for this configuration, at 1 of 1 sellers
- Back Market calls it Premium or Excellent
Shown on a MacBook Pro M2, for illustration.
Good
No seller lists this grade for this configuration today
- Back Market calls it Good
Shown on a MacBook Pro M2, for illustration.
From £342 for this configuration, at 1 of 1 sellers
- Back Market calls it Fair
Shown on a MacBook Pro M2, for illustration.
iMac 21.5" specs
- Screen
- 21.5" Retina display · 219ppi at a resolution of 4096x2304
- Processor
- Intel 3 GHz Quad-Core i5 7th gen , with Turbo Boost up to 3.5 GHz
- Memory
- 8GB 2400MHz DDR4
- Graphics
- AMD Radeon Pro 555 with 2GB memory
- Shipped with
- macOS 10.12 (Sierra) or above
- Latest software
- macOS 13 (Ventura)
- Bluetooth generation
- 4.2
- Wi-Fi generation
- 5
- Thunderbolt port count
- 2
- Thunderbolt generation
- 3
- Model identifier
- iMac18,2
- Model number
- A1418
- EMC number
- 3069
- Released
- June 5, 2017
- Discontinued
- March 19, 2019
- Weight
- 12.48 lb
- Size (H x W x D)
- 17.72in x 20.79in x 6.89in
Questions about the iMac 21.5"
What is MNDY2?
MNDY2 is Apple's part number for the iMac 21.5" 2017 512GB Silver. The one on this page is a custom configuration of it, with 8GB memory. Its model number is A1418. Apple released it in June 5, 2017. Apple sold it new until March 19, 2019. It runs macOS 13 (Ventura).
Which seller has the cheapest refurbished iMac 21.5"?
Today it is Back Market, at £342 for a Fair (C) unit with 1‑year warranty. The cheapest Excellent unit is £364 at Back Market.
What warranty comes with a refurbished iMac 21.5"?
It depends on the seller. On this page: Back Market 1‑year warranty. Every seller here takes returns for 30 days.
Is a refurbished Mac mini worth buying?
Yes, for most buyers. A refurbished Mac mini performs like a new one for less money, and a desktop that never leaves your desk carries little of the risk of a used laptop. On 7 October 2026, Back Market listed the M1 Mac mini with 8 GB and 256 GB at $488, about 30% below Apple's $699 launch price. eBay Refurbished listed the M4 with 16 GB and 256 GB at $729, $170 less than Apple's new M6 Mac mini with the same memory and storage at $899.