We got this swing by Fisher Price used. The couple we bought it from had a 4 month old baby and everything looked new. We didn't get any of the paperwork on it. It immediately made our life soooo much easier because our baby LOVES her swing. Without it I don't think I would have got any sleep. The motor slowly started to seem like it was losing power. Then last night it died and we were so bummed. DH called customer service this morning and even without any paperwork they replaced the whole top part ($50 to order) for free!! They said that the motor should last through 2 kids and holds up to 25 lbs. And because baby is so attached to it they upgraded the shipping to priority for free also.
I highly recommend this company. Because of this we are definately buying their high chair. The only thing I would do differently if we were to purchase this swing brand new, is to buy the one that will take batteries or plug in to the wall. We just have the battery only one and because kiddo uses the heck out of it we go through a lot of batteries.
This is the one we have.
http://www.toysrus.com/product/index.js ... Id=3090973