Got 4 Roland Expansion Board that I got a couple years ago. It's a sound card chip that you install into the back of your Roland keyboard and it gave you more sound (patch). All Roland Music Workstation like the XP-30, XP-50, XP-60, XP-80 has port in the back of the keyboard to install thease expanion board chip.

　　I paid $225 for each, now I selling all for $200 or $50 each.

　　I have the

　　Session

　　Bass & Drum

　　World Collection Asia

　　Piano

　　Call me any time

　　Location: CLINTON/99