Air conditioners with a 15 SEER rating can be purchased at Sears, ACWholesalers.com, TheACOutlet.com, Alpine Home Air Products and Ingram's Water & Air Equipment. As of March 2015, Sears.com carries over 500 different 15 SEER air-conditioning units from such brands as Goodman, Rheem, Amana and York.
The cheapest units are the Klimaire 15 SEER air conditioners that cost around $800, while the most expensive are the Rheem 15 SEER two-stage variable-speed air-conditioning units that cost around $6,250.
AC Wholesalers sells a 2.5-ton 15 SEER air-conditioner unit that is manufactured by Goodman and costs nearly $2,400. The unit comes with free shipping within one to two days.
TheACOutlet.com stocks a 2-ton 15 SEER Goodman gas-package air conditioner that is priced at about $2,250. The website offers customers flexible financing options, including month-to-month payments.
Alpine Home Air Products sells the same 15 SEER air conditioning unit as TheACOutlet.com for a little under $2,300. The unit comes with free shipping and a 10-year warranty.
Ingrams Water & Air Equipment sells a wide range of Rheem 15 SEER cube air-conditioner units that range in price from about $1,450 for a split-system straight cooling unit to about $3,260 for a 5-ton split-system straight cooling unit.