If anyone has any technical skill or knows someone that does and can do a deal with them, these types of pallets can earn some good return on your investments. Of course not every customer return electronic automatically means it has a problem to start with, electronics, just like everything else, get returned for a variety of reasons.
One other thing to consider with loads like this, parts can also have a market. So if you do find something among the pallet that isn't working and you can't fix it, then don't over look the possible parts market.
Sometimes there is a lot of hidden money in liquidated stock loads that many people simply don't see because they are looking for the obvious quick dollar return. If you're prepared to look a little deeper, you can surprise yourself just how much cash these types of loads can return over the long term.