Audio advisor is a good site to buy from. I have purchased a bunch of stuff from them, including a CD player, a high end DAC, and a preamp. Very reasonable prices and very fast shipping. Never had a single problem. As long as you know what you are buying, that website is really good to do business with.
High priced interconnects are the bread and butter of every single audio shop. That's just the reality of the market today. No small independent audio shop can stay in business just by selling mainstream audio gear. They simply don't make enough profits on those.