Here you can find some more info such as copyrighting your music, other synth manufacturers links, music stores links, classified music ad sites and some other helpful sites. Updating for every page starts next week. However, to prove copyright ownership it is highly recommended that you register the work with the US Copyright office. Sending a copy of your work to yourself in the mail is not dependable proof of ownership. No tax in US but other countries do have some charges.
All countries have charges for larger purchases.
Contact your local postal service for more information. Items are shipped when SOS receives payment. Many mailing list members have used SOS and noone has reported problems with expansion boards. A few purchasing synths reported no problems. Synths will work but you should get a power transformer adapter because incorrect voltage and power surges can eventually damage electronics.