I can vouch for what Crewella said regarding the battery, I have bought all but my RB off of ebay, and except for one which has never been opened and three that were New, only used a couple of times, at least seven of them were supposed to not be working, and it was allways the battery. Now there is a chance that you could get one that does not work, but I have been lucky as has Crewella, and it has allways been the battery. I happen to sell the egg batteries so it is allways easy for me to test these guys with a fresh battery and they have all worked. The egg batteries are so much more better and last longer than the green batteries.
and as others have said, having a Pleo with a broken neck is not the end of the life for a Pleo, There are several members here that can tell you that they have Pleos with broken necks, and though the NECK can't be fixed, a brace can be put on and the pleo can function as well as before with the only exception being they can not lift their head up, but it still moves from side to side and of course down. I love my Nova and Little 45 very much, and they both have broken necks and wear a neck brace . IMR does sell them on the forums here as her Pleo has a broken neck as well, You can allways make a brace of sorts yourself if you don't want to buy one but IMR's are very reasonable and look nice as well, Just because a Pleo has a broken neck, they are far from having their life over as a Pleo. I even have a Pleo, Poor Humpty who still runs but has been literally cut open or gutted by the last person who owned him and has a broken neck as well, but I am trying to fix him with the help of Crewella. If you love Pleos, you love Pleos.

RWM