Magicos are extremely well built and will hold more value than other speakers. If you were to not like them you might get $30,000 on a re sale. If loosing $20,000 is not a problem for you then go for it. If it is than do not unless you can evaluate the speakers appropriately before you by them. Over time they will appreciate. Also, speakers are about to take a big jump in price like everything else so, the same quality speaker is going to cost at least 10% more in the near future.
I buy demo items all the time as long as they come with a completer warranty and they are in perfect shape.