Hi and welcome to the pleo forums. Congrats on your new pleo. First of all, if this came from ebay, my own experience tells me both as a buyer of Pleo and a seller of pleo items and adopted pleos. always ask questions before buying, Is this a Pleo RB, or a Ugobe Pleo, the original ones from 2007? If orginal, then it makes sense that the battery would not likely work after all this time, but new ones can be purchased..
What is wrong with pleo, a battery issue, broken neck, or a hardware or software issue? Did they post lots of photos of it? I could not read or click on the link that was in yellow. If it was written in black then perhaps I could take a look. If it is being sold AS IS, but there is not a flaw in the description such as broken neck, then if it does not work, you may get your money back. But if it is AS IS and they state does not work and they say it has a bad battery, then you can probably get the battery solved, simply by a new battery that you can buy or a refurbished one perhaps. I just need more info, and is it a RB, or a Original one.? Pleos are great fun and you can find the answers to just about anything Pleo here.
RWM :cat-hug:and the Pleo township of the REdwoods