Gazelle is ending its used device trade-in program
Gazelle is ending its entire device trade-in and buy-back program, with the closure effective February 1, 2021.

After 14 years, Gazelle is ending its device trade-in program
Founded in 2006, Gazelle had been one of the most popular online services for trading in used iPhones, iPads, and other mobile devices. The company announced the move today and hasn't yet stated why it is backing out of the trade-in market.
Gazelle plans to remain in business, solely focusing on its certified pre-owned device sales. The company's used-device marketplace offers inspected iPhones, iPads, MacBooks, and devices from Samsung and Google at less than retail.
Customers in the middle of an existing trade-in process will still receive their agreed-upon compensation as planned, and they can log into their trade-in account to check on the current status.
The firm will reach out to customers who have a Gazelle Rewards account, allowing them to claim their rewards points by January 31, 2021.
Gazelle is recommending ecoATM as an alternative service that offers instant cash for used devices while eliminating e-waste. The ecoATM kiosks dot the U.S., and are often found in malls, Walmart locations, and grocery stores.

After 14 years, Gazelle is ending its device trade-in program
Founded in 2006, Gazelle had been one of the most popular online services for trading in used iPhones, iPads, and other mobile devices. The company announced the move today and hasn't yet stated why it is backing out of the trade-in market.
Gazelle plans to remain in business, solely focusing on its certified pre-owned device sales. The company's used-device marketplace offers inspected iPhones, iPads, MacBooks, and devices from Samsung and Google at less than retail.
Customers in the middle of an existing trade-in process will still receive their agreed-upon compensation as planned, and they can log into their trade-in account to check on the current status.
The firm will reach out to customers who have a Gazelle Rewards account, allowing them to claim their rewards points by January 31, 2021.
Gazelle is recommending ecoATM as an alternative service that offers instant cash for used devices while eliminating e-waste. The ecoATM kiosks dot the U.S., and are often found in malls, Walmart locations, and grocery stores.
Comments
Examples might be corporate equipment recycling services, major retailers (such as Best Buy, B&H, Costco, etc.) as well as the major carriers such as AT&T, Verizon, etc.
Those are ones off the top of my head. I'm sure there are others that I overlooked.
From an operational standpoint, it probably cuts costs since they don't need to deal with individual consumer transactions. They can stick with larger organizations that offer volume.
Thus Gazelle works with some corporate used equipment broker. "We have 350 used iPhone X units from Corporation Z [Fortune 100 company] and 800 iPads from Los Angeles Unified School District. Are you [Gazelle] interested?"
If you want cash that's surely worth something, but if you are find with an Apple Store GC (which I am since I'm going to buy another M1 MBA) then via Apple may be the way to go.
I'm not sure if it's a one-off option, but Decluttr does say they'll give you an extra 10% if you sign up with an email. ¯\_(ツ)_/¯
This will be bad for my company though, as we sell our 2 year old iPhones back to Gazelle in bulk. Will have to find a new vendor to buy them back.