Hands off. Dangerous.
If this printer is in proofed working condition, $ 1'200 is a good price (SC540 is at minimum 11 years old). But if not, it could take several tousand Dollars to bring it up and running again. 6 x DX4-Heads, each of them around $500 or more, 12 Dampers, 6 Cap Tops, 3 Pumps...