How quickly do you need it? I have an AC70 (with lid) and have been tempted to switch to a canister or DIY sump, but I couldn't box it up for you right now because I'd have to replace it with something else first. (Well... I could finagle things around a manage on my other filters for a little while...) What do these typically go for (used)? I have no idea. Mine came with the tank. The setup was pretty cheap, from a fish store going out of business
(), so I really don't know what the filter itself is worth. It seems to be in great shape. I've had no problems with it.