Which Used NAS Fits You? 4 Options from $71 to $350

A used NAS doesn't have to be expensive. These four network attached storage units range from a $71 2-bay NETGEAR to a $350 Synology 4-bay, with a 6-bay and a rackmount in between.

Last updated Aug 17, 2026

Choosing a used network-attached storage (NAS) unit for your home or small office is a balancing act between drive capacity, form factor, and budget. These four used options in the storage NAS networking space each take a different approach to that balance, and they span a wide price spread.

Quick take

If maximum storage capacity is your priority, the NETGEAR ReadyNAS RND-6A is the one to consider. On a tight budget, the NETGEAR ReadyNAS 202 gets you a functioning NAS at the lowest price. The Netgear ReadyNAS 2100 and Synology DS423 round out the group with their own strengths.

Price comparison

The table below shows the four products and their prices, with relative price bars. A longer bar means a higher price relative to the group.

| NETGEAR ReadyNAS RND-6A | USD 129.99 | | 6-bay |

| NETGEAR ReadyNAS 202 | USD 71.00 | | 2-bay |

Decision matrix

| If you want... | Pick... | Why |

| Maximum storage capacity | NETGEAR ReadyNAS RND-6A | Most drive bays among the four. |

| The lowest price | NETGEAR ReadyNAS 202 | Cheapest way into a NAS. |

| PC and Mac compatibility | Netgear ReadyNAS 2100 | The only unit offering both. |

| A Synology enclosure | Synology DS423 | The Synology model in this group. |

Product notes

NETGEAR ReadyNAS RND-6A

The ReadyNAS RND-6A is a 6-bay NAS with RJ-45 and USB-A connectivity, priced at USD 129.99. That puts it in the middle of the price range, but it offers more drive bays than the cheaper models. If you have drives ready to install, this gives you the most expansion room of the four for a mid-range price. The unit is used and shows cosmetic wear, including scratches and scrapes around the body, and it ships without cables or hard drives. That means you'll need to supply the drives and the connection cables. Choose this when drive capacity matters more than condition or included accessories. The 6-bay design also means you can start with just two drives and add more later without replacing the chassis, which gives you a clear upgrade path within a single device.

NETGEAR ReadyNAS 202

Priced at USD 71.00, the ReadyNAS 202 is the least expensive NAS here. It offers two hot-swap drive bays, dual Gigabit Ethernet ports, and USB 3.0, plus a 1.4 GHz dual-core processor and 2 GB RAM. That's a solid feature set for a starter NAS, and it's enough for basic file sharing, backups, and streaming to a small number of devices. The downside is the two-bay design, which caps total storage capacity, and no extra accessories are included. If you're looking for an affordable way to centralize files for a small household, this is the entry point. But if you anticipate needing more than two drives soon, you'll outgrow it.

Netgear ReadyNAS 2100

At USD 149.99, the ReadyNAS 2100 is the rackmount option. It holds four 3.5-inch HDDs and works with both PC and Mac, making it flexible. However, no HDDs and no power adapter are included, so you'll need to source both separately. The unit is described as showing minor cosmetic wear while being fully functional. If you already have a rack or are planning one, this is the only unit in this group that will fit. The missing power adapter is a real caveat, but if you have a spare or can buy one, the rackmount form factor is hard to find at this price. With four drive bays, you can build a decent-sized storage pool for a small office or homelab rack.

Synology DS423

The Synology DS423 is the highest-priced unit at USD 350.00. It's a 4-bay enclosure with Ethernet connectivity and HDD support, and it's described as fully functional. But it comes without drives, and all sales are final with no returns. That's a significant limitation if you want the option to send it back. If you specifically want a Synology NAS and are willing to pay more than the NETGEAR alternatives, this is the one to get. The final-sale nature means you should be confident in your purchase before committing. The four drive bays give you room for a substantial amount of storage once you add drives, and the Ethernet interface connects it to your network for shared access across your computers.

Final recommendation

Your choice ultimately depends on what matters most. For maximum drive capacity, pick the NETGEAR ReadyNAS RND-6A. For the tightest budget, choose the NETGEAR ReadyNAS 202. When a particular form factor is essential, go with the Netgear ReadyNAS 2100. And when you want a Synology, select the Synology DS423.

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