The probability that this player is hacked is extremely high. In the description there is a clue that this player is a hack.
Look at the memory capacity. It says "4Gb" with a small letter "b". For this player to be a real 4GB player, it should say 4GB with a capital letter B.
4Gb means 4 Gigabits, a very small capacity. 4GB means 4 Gigabytes, a large capacity.
4 Gigabits (4Gb) = 512MB (megabytes). That means this player does not have a large memory capacity.
Hacked sellers do this because very few people know the difference and don't know there is a huge difference between gigabytes and gigabits So when buyers read "4Gb" with a small letter b they think it has a very large capacity. Its not. It means 4 Gigabits or 512MB player because 4Gb = 512MB.
Some buyers simply miss the clue because it is so sutle.
It may be a bit confusing and I hope I've explained it ok. Just know that when you read a player having 4Gb with a small letter "b", you are really looking at a player with a memory capacity of only 512MB, a very small memory capacity. It is not a real 4GB player.
When a buyer complains the seller emails back with something like "the memory capacity was clearly marked 4Gb. You should have known the difference". The seller will blame the buyer.
If the buyer puts in a claim with ebay, the seller shows ebay the description saying "the capacity is clearly marked" and the history of ebay has been to deny the claim.
Check your player as soon as it arrives. The probility that your player is hacked is extremely high.