I bought two of the MCS30 Lytron units (alum rads) a while back on Ebay for $75.......The cases were somewhat scarred up but the internals were like new.......They were represented as MCS20 units (copper rads) which is what I was looking for.......So I didnt end up using any of the components......
I did however sell the two Iwaki MD70RXT pumps for a total of $250 and the two radiators (identical to BillA's) for $40 total and the two 172mm 110v fans for $20 total......thats $310 + shipping for a $75 investment......not bad