DON'T put the buds in an air-tight container, UNLESS you are going to pour the buds out at least once a day to crisp-back up. Even if the buds feel dry to you, chances are they are still wet on the inside. After about 6-7 hours in a jar, the moisture is reabsorbed evenly through-out the buds (they'll feel really wet). This is when you have to pour them out and allow them to dry for 1-6 hours, before putting them back in. If you allow the jars to stay shut for more than 24 hours, the high moisture levels will cause mold/bud-rot.
Since your nearing the end of your grow, just make a cheap carbon-filter to hold you over. Go to your local fish-store and buy some activated carbon. Then go to Wal-mart or Home Depot, and buy one of those air-filters (the ones you replace in your central-air unit). Cut the filter-material out and form into a square-envelope shape (I just folded and stapled) Activate the carbon by wetting it, pat the carbon dry, and pour into the 'filter-envelope'. You don't want to pour a ton in, just enough to have a thin even layer. Finally, seal the remaining side that's open. When your done, it should look like a reeeally thin bean-bag. Your goal is to force as much air through this bean-bag as possible (which is why you have to make it really thin). Rig-up the back of a fan to something like pvc-pipe. Throw the bag in whatever you connect the fan too. Make it air-tight and be sure that the whole system is breathing (suction on the end containing the filter, blowing at the end containing the fan.) This should definitely hold you over!
