uglyHDTHE STORAGE PRICE INDEXFind my drive
HDD · SAS

WD Ultrastar DC HC550 18TB

part number WUH721818AL5204

Capacity
18TB
Connection
SAS
Hardware
3.5" HDD · CMR
Best available offer · 3 listings
$415.00
$23.06 / TB

Total includes shipping

UsedBuy on eBay →

prices last checked 2026-10-16 18:07 UTC

Some Buy links earn commission. Who pays us ↗

deal rating
3 — Fair

uglyHD's price-history score 2.8 · five pumpkins is an amazing, off-the-chart deal · how it’s scored

price-drop alerts

We will email you a confirmation link first; alerts only go to confirmed addresses; every email has an unsubscribe link.

price history
Lowest / TB
$17.78
Median / TB
$25.83
Current / TB
$23.06
$15.42$22.50$29.582026-09-112026-10-16
2026-10-16$23.06 / TB
all listings
Marketplace listings for this drive
SourceConditionPriceShip$/TB
ebayUsed$400.00$15.00$23.06Buy →
ebayRefurb$539.00free$29.94Buy →
ebayNew$550.00free$30.56Buy →
head to head
vs Dell Enterprise Nearline 18TB→vs Seagate Exos X18 18TB→
cheaper per terabyte

Same interface and drive class, less money per terabyte.

Hitachi Ultrastar 7K6000 2TB$7.50/TBSeagate Constellation ES.3 4TB$7.50/TBHGST Ultrastar 7K4000 3TB$8.33/TBToshiba MG04 2TB$8.49/TBHGST Ultrastar 7K4000 2TB$8.97/TBHGST Ultrastar 7K4000 4TB$9.00/TB
related drives
WD Ultrastar DC HC550 16TB SASsame model, other capacity$34.94/TBSeagate Exos X18 18TB SASother 18TB SAS drive$20.27/TBSeagate Exos X20 18TB SASother 18TB SAS drive$36.06/TBToshiba MG09 18TB SASother 18TB SAS drive$55.28/TB
unbranded alternative

Sellers listing the same capacity, interface and form factor without naming a manufacturer or model — could be this drive, could be a different one.

Unbranded 18TB SAS — model not stated by sellerfrom $55.28/TB