Originally Posted by NCboatrx
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I suspect that they are being removed because they do not comply with emissions. Ask all the questions before placing your order.
They still make, sell and use Lister traction engines over there.
More likely it's because of the unavailability of spares, which would be an argument also against the OP's plan.
He could of course buy two or three of them, and use the extras for parts
Considering what a PITA it usually is to reconfigure engine logs
etc. etc. etc. etc. for different machinery, that might actually be worthwhile.
Keeping an engine going, for which you can't buy spares, is a different kind of PITA, however, that one would want to be very well prepared against.
Only the OP can judge which is the lesser of the two PITAs.