I got my replacement at Wal-Mart for about $50. Has performed well for 2 years, even when the car is not started for 2 weeks during the winter.
Determining the "freshness" of a battery is sometimes difficult. Never buy a battery that is MORE than SIX months old because it is starting to sulfate. [Sulfation occurs when lead sulfate can not be converted back to charged material and is created when discharged batteries stand for a long time or from excessive water loss.] The date of manufacture is stamped on the case or printed on a sticker. It is usually a combination of alpha and numeric characters with letters for the months starting with "A" for January (generally skipping the letter "I") and digit for the year, e.g., "J6" for September, 2006. Like bread, fresher is definitely better.
There are only a few manufacturers. They "private label" their batteries for large chain stores. Below is a list of the largest domestic battery manufacturers/distributors in North America and who the manufacturer is. (I'm not sure how up to date the list is, but you get the point.)
Johnson Controls Inc. (JCI)
-Ameriton
-Duralast (Contact local Auto Zone store)
-Energizer (Contact local Target or Wards store)
-Equalizer (Contact local Wards store)
-Eveready (800-331-9926 or contact local Costco or Wards store)
-Interstate (800-272-6548)
-Motorcraft (800-392-3673)
-Power Connection
-older Sears Diehards
East Penn (610-682-6361)
-American
-Electro
-Deka
-Hi-Tech
-Pow-R-Surge
Douglas (800-368-4527)
-Farmland (Contact local store)
AC Delco/Delphi (800-223-3526)
-Diehard Gold (Contact local Sears store)
-Double Eagle (Contact local Firestone store)
-Dura Power
-Everstart (Contact local Wal-Mart store)
-Freedom (Contact local Sears store)
-Lastcell (Contact local Trac Auto store)
-Tough One (Contact local Western Auto store)
-Voyager
GNB (800-242-6750)
-Champion (Contact local Sams store)
-Omaga (800-925-6278 or contact local Wal-Mart store)
-Voyager (Contact local Sams store)
Exide (800-346-3760)
-Auto Express (Contact local Wards store)
-Centura (Contact local K-Mart store)
-DieHard non-Gold (Contact local Sears store)
-Edge
-Legend (800-538-6272 or contact local NAPA store)
-Motorvator (Contact local K-Mart store)
-Power-Tron
-Prestolite (Contact local HiLo store)
-Pro Start (Contact local Pep Boys store)
-Quick Start (Contact local Wards store)
-Sears (Contact local store)
-Titan
-Value-Lite (Contact local Firestone store)