The Play:5 (Gen 1) is only compatible with the S1 app, so you would have to set it up using the S1 app.

Got it! So, i set the speaker in S1, report it to trade in program and than i can use the discount?  I suppose all of it is linked to single account? Also, is there a way to check if the trade in discount is used on the specific product?

Neven

The trade in discount can be used on any product, including speaker sets.  Be forewarned though that if the previous owner already used the Play:5 for a discount, you will not be able to use it for discount again.  If you have not already purchased the Play:5 I would asked the owner about the discount before purchasing.

Unfortunately, you have to trust him, there is no way to check whether or not the device’s trade in has been used or not, other than actually trading it in. 

I suppose you may be able to call in with a serial number, but I wouldn’t lay money on that. 

Thank you very much.

Neven

If you’re buying through ebay or similar site, you should have a money back guarantee of some sort if the product isn’t as advertised.  As well, you can give poor reviews.