What does Samsung do with Trade-in units?

[CLuigi]

Any ideas what Samsung does with the trade-in units? They're offering some pretty good deals with old units even those with issues. 

Are they recycling the parts? Because the sometimes the price with vouchers become so low that I am not sure if Samsung can make a profit off of it.

Would be curious as well if they have a store which sells those trade-in units at a fairly discounted price.

[dorefrain]

As far as I know pre-owned units from Samsung were acquired by Compasia. And they resell it at lower price.