Tandem Axle. Cost new in 2008: $30,000. Every option including: thermal-pane windows, sky light, oak cabinets, shower inside & outside. AM/FM CD/DVD & TV. AC roof 11,000 BTU, solar panel, hitch & stabilizer bars, 30,000 BTU furnace. Includes all camping necessities: pots, pans, hoses, etc. Truly 4-season. Best campers ever made.