Elektron Musical Instruments

HI all.
There is a sidstation up for auction on ebay that I am considering to buy. The seller 
says it is in great shape and works perfect. In an email he said that he got it off 
another guy who said it did not work, but he found out that just the power supply 
was dead. So he replaced the power supply, and now it is fine. He told me that power 
supplys on the sidstation needs to be replaced every year or so. Is this true and a 
common occurance with the sidstations? If so doo the guuys at Elektron do the 
replacement? or is it a DIY job? Any information about this or advise on purchasing 
this sidstation would be greatly appreciated. Thanks.
-Jason