whats a el tickford auto ecu worth?

hey just got a ecu with my ghia when i bought it, the car has the xr6 motor and 3.45 lsd so im assuming it comes with a tickford computer too? the guy i got it off put a concorde computer in it or something i dunno why but he gave me the old one.
whats it worth? i know its like $500 for a manual el tickford ecu but not sure what the auto ones are going for these days
thanks in advance cheers guys....
whats it worth? i know its like $500 for a manual el tickford ecu but not sure what the auto ones are going for these days
thanks in advance cheers guys....