• iPhone 6 (L), iPhone 6 Plus (R)

iPhone 6 (L), iPhone 6 Plus (R) (Photo : Reuters)

iPhone 6S and iPhone 6S Plus release date is scheduled on Sept. 9. With the release of new iPhones, consumers are already looking for iPhone 6 trade-ins and discounts to sell their devices.

Right before the announcement of new iPhones, carriers and resellers are offering various deals to previous iPhone owners who wanted to upgrade their smartphones to the latest Apple device. Getting the best trade-in deal for your iPhone 6, iPhone 6 Plus, iPhone 5s or other current smartphone can give you additional funds that you can use in purchasing the next iPhone.

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Looking for the best iPhone 6 trade-in and discounts? Check out the list below.

1. Apple

Apple offers credit in store or gift card for old Apple devices. Apple retail stores will appraise the device based on its condition. Buyers can head to Apple stores for iPhone 6 trade in and to purchase the new iPhone.

2. Gazelle

Gazelle announced that it is offering a Best Price Guarantee on iPhone 6, 6 Plus and 5s trade-ins until Sept. 9. This will ensure users to get the best trade-in value with 30-day grace period. This means that users can lock in the trade-in price for 30 days. Thus, users can wait for their new phone before they send their old one. Users can trade old iPhones of various storage variants.

3. NextWorth

Similar to Gazelle, NextWorth offers trade-in service for iPhone 4 through iPhone 6 Plus. The trade-in price is valid for 30 days. NextWorth offers higher prices on average for the iPhone 6 and iPhone 6 Plus than Gazelle, with trade-in values up to $480. However, the specific trade-in price depends on the condition of the handset.

4. Amazon

US retail giant Amazon has a trade-in store where one can search devices they want to trade or receive a quote for a device. Users can receive Amazon Gift Card in exchange of old iPhones.

5. Carriers

Almost every US carrier will offer iPhone 6S and iPhone 6S Plus and they want to attract more subscribers by offering trade-ins to previous iPhones.

Below is the comparison of the prices offered by various US carriers:

AT&T: $300 (iPhone 6), $325 (iPhone 6 Plus), $135 (iPhone 5s)

Sprint: $335 (iPhone 6), $340 (iPhone 6 Plus), $115 (iPhone 5s)

T-Mobile: $351 (iPhone 6), $361 (iPhone 6 Plus), $136 (iPhone 5s)

Verizon: Prices not available at this time.