Best deal I've found so far is at Sam's Club. They have the Igloo Polar120 (120 quart) Ice Chest for $39.95. They're not always in stock, just at certain times of the year. Since I use the two I have primarily for box storage (with cello off), I haven't bothered to line them with cedar. Probably would if I were going to store loose cigars in it.
BTW, with small tupperware containers filled with beads and the tops drilled with holes, I have had no problem at all keeping the RH at 65 degrees (I keep mine dryer because I've found it cuts down on any draw problems significantly, with no reduction in flavor that I can determine).
Just my thoughts....................