Basically, you have three main options with the used networking equipment you no longer use:

1. Dispose of it/recycle it
2. Repurpose it (i.e., using it on another system or network)
3. Sell old networking equipment for extra cash, which may finance the upgrade

Which one is the best option for your used networking? It depends on several key factors:

• Condition: if the networking equipment no longer works well, then your only option is to dispose of it or recycle it. If it's still working but not in perfect condition, you can probably still sell or repurpose the module. 
•  Resale value: pretty self-explanatory. If the resale value of the equipment is still fairly high, then obviously, selling it is a viable option. However, if the resale value is relatively low despite it being in fairly good condition, then you might be better off repurposing the networking equipment.
• Replacement cost: if you are planning to replace the networking equipment unit with a newer one (upgrade), then selling the equipment too soon when the replacement unit is still too expensive can be an issue. It's better to wait a bit until the replacement equipment's price has gone off before selling the old asset.

Whether it's a network switch, a router, or other types of networking equipment, there are viable ways to sell your used networking equipment and make extra cash from it.

While your options may vary depending on the type of equipment, your location, or other factors, basically, you have three major options in selling your old networking equipment:

1. Finding your own buyers on peer-to-peer marketplaces (like eBay), you have the most freedom in setting your prices and "promoting" your networking equipment, but it can be difficult to find the right buyer willing to purchase the goods at your terms. Also, it can be challenging to sell enterprise-grade equipment on these marketplaces.
2. Listing your used network equipment on classified sites like Facebook Marketplace, Craigslist, or even Amazon. It's typically easier to find buyers on these platforms when compared to on peer-to-peer marketplaces, but you'll have less freedom in setting your terms and prices.
3. Selling your goods to specialist IT Asset Disposition (ITAD) companies that specialize in purchasing used IT assets, including old networking equipment. This is the easiest and quickest option, and you can still sell your networking equipment at a fair market price. If your equipment contains sensitive/regulated data, these ITAD companies will also perform secure data eradication for you.

Whether it's a network switch or other types of network equipment: gateway, hub, router, and so on, you can basically sell your network equipment in just a few simple steps:

Step 1: Evaluate the condition

Evaluate the condition of the network equipment, both in terms of physical condition (check for any defects) and performance. Check whether the network equipment is still working properly. Be honest, and list any defects and imperfections you've found.

Step 2: Know your equipment

If you've confirmed that the network equipment is working properly, then the next step is to identify the equipment's exact model to determine its value.

If the equipment has a visible brand/model name or serial number on it, then this process should be fairly easy. 

Step 3: Taking pictures

Take photos of your network switch or other types of equipment, so you can show them to prospective buyers. 

Make sure you capture the equipment's serial number and model name (if it's visible on the product). It's also important, to be honest: if there are any defects on the product, make sure it's captured in the photos.

Step 4: Finding buyers

Find prospective buyers, whether listing your product on classified sites, peer-to-peer marketplaces, or contacting an ITAD specialist company like Big Data Supply Inc.

Step 5: Packaging and shipping

Once you've found a buyer, then what's left is to package and ship the network switch or other types of network equipment you are selling to the buyer. Some ITAD companies may also offer to pick up your goods on your premises, especially if you are selling in bulk.

How to determine the value of old network equipment?

While the answer to this question may vary depending on the type of equipment you are looking to sell, as well as other factors, here are some of the most important factors to consider when assessing the resale value of your network equipment:

• Age: the older a network equipment is, obviously the lower the market price will be.
• Condition: fairly self-explanatory, a "healthy" piece of network equipment will be priced higher compared to equipment with cosmetics of functional defects.
• Newer model(s) available: Network equipment or any technology assets, in general, will typically decrease in price when a direct replacement has been released (i.e., a used iPhone 12 will decrease in price as soon as iPhone 13 has been announced.) If there hasn't been any direct replacement released, even if the network equipment is relatively old, then typically, the price won't go down a lot. 
• Rarity: sometimes, archaic network equipment can go up in price if it's no longer available on the market (i.e., for collectors, or if the equipment is useful in certain use cases)

This is a non-exhaustive list, and there are other factors that may affect your network equipment's price. 

Fortunately, it's now fairly easy to check for the average marketplace of specific network equipment, as you can simply search for similar goods on sites like Amazon or eBay.