What are the advantages of the apple reuse programme compared to selling yourself?
Definitely a convenience factor, plus I wonder how many typical consumers actually sell their iPhones. This will give them an avenue to get a little money instead of having an old phone sitting in a desk drawerWhere Apple has these programmes, you know that the buyer won't try to cheat you out of your money, but you won't get as much as selling yourself (but again, the highest bidder might very well be a cheat not intending to ever pay you). And it's more convenient.
The Apple program is convenient, but you get more selling it yourself.
So you would need to weigh hassle-free exchange versus hassles of self sale including unscrupulous buyers.