Speaker: $5. Work very well.

Sealy Natural rest crib mattress: $20(the original price is $100), in very good condition, like new.
More details please see: http://www.amazon.com/Sealy-Natural-Rest-Crib-Mattress/dp/B00COSKJES/ref=sr_1_4?ie=UTF8&qid=1412463550&sr=8-4&keywords=sealy+crib+mattress+natural+rest

Car cover: $10. Never used. Size M.

Quad chair: $10, in good condition.