I have used two of these dehumidifier packs since 2005. They are reusable, over and over, forever. They have indicators to show when they are absorbing moisture/humidity. To recharge them, all you do is put them in your oven for a little while. These exact ones sell on eBay so you can see the prices. They sell in single packs for as high as $15. I was going to order two more for my cars while they are in storage, but ordered a case of 12 instead from a guy for $96. So I have 10 new in package 200 gram silica packs for sale cheaper than you can usually order them online or at the big outdoors stores. They are recommended for gun safes, ammo storage, cars in storage, money boxes, garage tool boxes, stored electronics- basically anywhere you don't want moisture to damage whatever you have that may be subjected to any humidity. They cost nothing to operate, unlike gunsafe dehumidifiers which require electricity to operate. Mine proved their worth during the 2009 ice storm, when we were without power for 13 days and my garage safe was subjected to the cold temps and moisture from the 4" of ice we got here. One box should ship via USPS 1st Class Mail for $4. Two or more would be cheapest shipped by USPS Priority Mail. $8 each plus shipping, which is what I paid.
100_0868 by kentuckyyeti, on Flickr
100_0869 by kentuckyyeti, on Flickr
100_0870 by kentuckyyeti, on Flickr
100_0868 by kentuckyyeti, on Flickr
100_0869 by kentuckyyeti, on Flickr
100_0870 by kentuckyyeti, on Flickr
