I'm quite glad to know that you found them helpful!

You can pretty much apply the principle of selling old stuff with other things you have in the house. This is quite a profitable venue for getting rid of things like old clothes/accessories that you no longer use (but are of old quality!). And if you are a beginner, its a great way to start - no capital needed and you get to practice your selling skills 'til you get really good and can risk the investment.
All the best! Hope you get to sell your old phones.
Cheer
