Their prices seem quite reasonable.
Their interconnects are 40 and 100.
You could DIY them for about 35 and 50 respectively.
That is a very fair and reasonable mark-up. The 40 cable is particularly keenly priced.
The 40 day money back is good aswell.
Silver interconnects are love it/hate it.
Silver interconnects are IMO detailed and clean sounding, but a little bright in some systems, and sometimes not as full sounding as copper.
If you were looking at the dearer of the two, it might be worth PM'ing WadiaMeister. He could perhaps demonstrate the difference between a silver cable and one of their entry level interconnects.
Cheers
Chris