Mellotronists

As most of you, I have been obsessed, haunted, and amazed by the 
instrument, and have dreamed of owning my own for years.  "Epitaph" 
still gives me chills when I hear it.  But how much do they cost, and 
how hard are they to find?  If it's in need of repair, how hard will 
it be to restore?  Thanks.  Simply finding this group makes me feel 
like I've finally made it home!