Calculate the Total Cost of Ownership (TCO), which includes the purchase price, refurbishment costs (new dampers, wipers, or capping stations), and international shipping. A used machine should typically be priced at 40-60% of the current market price for a new model to justify the risk. Evaluate the availability of spare parts in your local market; if parts for an older model are discontinued, the machine becomes a liability. Prioritize brands like Epson, Roland, Mimaki, or Konica Minolta due to their high resale value and global support networks.