Will storing used speakers for 1 year damage it?

I hope not, I have some that have been in storage for a year. Climate control is the best way to store--you don't want radical humidity or temperature changes. Also, when you do get the speakers out you will have to break them in much like a new pair.

Store them in a dry, medium warm place, make sure that no UV light might affect the chassis. Sit back as often as you can in the hassle of building and/or moving close your eyes and look forward to getting them out and running!
Good luck!

Try to store them in a climate controlled environment. Extremes of temperature and frequent temperature changes may effect driver surrounds and high humidity could corrode binding posts or other contacts. Also, try to cover them or store them in their shipping container to protect them from dust.

I agree with the above. But, if you're not going to use them for a year, why not wait a year to buy a pair, and take advantage of further depreciation for a better price (unless you like the seller, or other factors are coming into play)?

Rcprince, if people with good common sense, such as you have, had been working at Enron, then the company would still be in business and making a legitimate profit today. Put your money aside for the move, tyroneco! This speaker is not too difficult to find selling on Agon. And one year down the road, you might want something else entirely!