To find the model of the device you want to trade in, you can check its settings.
To verify the model of your Apple device
For Apple, model numbers can be found:
On the backside of the device
By going to: Settings > General > Information
To verify the model of your non-Apple device
By going to: Settings > About the device
For some devices, you can find the model number directly on the backside of the device or under the battery cover
On the original box (if you still have it)
Finding the specs of your gaming console
If you need the full specifications of your gaming console, you can find these:
On one of the sides of the console
In the console’s settings
On the original receipt or invoice
To verify the model of your MacBook
From the Apple menu in the corner of your screen, choose “About This Mac”. Then you’ll see all the information about you MacBook.
Once you have these numbers, look them up in a search engine to get all the nitty-gritty details (storage, memory size, processor, etc.).