CSU/DSU Market Value
Current market data for CSUs/DSUs based on 1190 eBay listings.
What you'll usually pay
💡 Buying used saves about 23% here.
👉 In short easy summary
The best value is found in Ethernet (RJ-45) interfaces, which sit 11% below the market median. Conversely, SFP interfaces and RAID 1+0 configurations command premiums of 36% and 62% respectively.
💚 Best value for your money
Price by interface
Why? Prices range from 35.6 for Ethernet (RJ-45) to 54.45 for SFP.
Price by raid levels
Why? RAID 1+0 is the most expensive at 64.69, while unspecified levels average 42.5.
Price by type
Why? Data Transfer Switches average 49, whereas Ethernet Switches are lower at 39.
🛒 Some on sale right now
Common questions
What is the median price for a new CSU/DSU?
The median price for new units is 51.99.
How much more expensive are SFP interfaces compared to the market median?
SFP interfaces have a median price of 54.45, representing a 36% increase.
What is the price difference between used and new units?
Used units have a median of 39.99, while new units have a median of 51.99.
How we got these numbers
Worked out from 200 live eBay listings (price range $12–$327, odd outliers ignored). These are asking prices, so use them as a guide. Last checked August 10, 2026.