Brand new, never installed. Trane Climatuff / Danfoss inverter scroll compressor, model RPA028A1CPA, part COM10829. 2.3 ton, R-410A, inverter drive controlled, 900-6000 RPM. For Trane variable-speed systems such as 4TTV0036 — needs the matching inverter drive, not a drop-in for a standard system. Variable-speed Trane compressors run $1,500-3,000+ new at supply houses. $600, local pickup in Spokane Valley. No shipping.