Walmart is offering up to $450 back on flagship Apple and Samsung phones

In exchange for buying a new phone, Walmart is offering customers up to $450 in eGift cards this Black Friday. You can get up to another $250 in eGift cards with a qualifying trade in.

Sonos offers its early adopters a 30 percent trade-in offer on new speakers

If you've been hanging onto an old Sonos speaker for forever but have been interested in switching to a recent model such as Move, One or Port, the company might tempt you further with its Trade Up program. If you have an eligible speaker, you can cl...