I confirmed that the main unit powers on with the included adapter, that an electric guitar can be connected, that the effects work, and that sound comes out of the headphones connected to PHONS. For the cards, the left one showed a card error, the middle one did not show a card error. I don't know if it's usable; the right one is unconfirmed. I have not checked anything else. I do not respond to price negotiations. I take care to package items appropriately for their price. Please purchase with confidence. This is a used item, so please refrain from purchasing if you are sensitive to such things. Also, please understand that this is non-refundable/non-returnable. I may be listing this on other sites, and the price may vary. Please understand that the item may sell out.