you can buy accessories online from the link below. > http://www.pandigital.net/search.asp?Mode=Type&TypeID=48
you can download book using other computer and load it to PanDigital eReader. so you don't need a dedicated internet line but can use the existing internet connection to download books.
1 GB internal memory with SD/MMC slot (supports up to 32GB cards).
if you are planning to by a new one then also try > http://news.cnet.com/8301-17938_105-20009738-1.html
let me know if you have any questions regarding the same.