I have three 4 ton units and one three ton unit, these are gas/electric, they are three phase 480 volt units. I am selling all four of these units for $1000. They were all built around year 2000 and have been stored, and never used, they are NEW. I got them as part of a package buy with a bunch of equipment, and have no home for these, maybe you do. These are 10 SEER units, let me know if you have other questions about them please. Price is firm, they are priced cheap for fast sale, $1000 for all of them! I can fork lift load on my end, and deliver for a fee local. I am in Hollister, California.