SQ used to serve Caviar House caviar; sadly it does not any longer, as the cost became too high. CX still serves CH but of a lower grade than before (but better than SQ in the current offering). Caviar House has shops in all the major airports (LHR, ZRH, GVE, JFK for example) and sell caviar at a variety of price points. They also have excellent smoked salmon. I've found CH to never disappoint. Some of their locations also have a snack bar, allowing you to spend a few hundred dollars for lunch, if you so choose (LHR does, maybe all do now). Well worth seeking out Caviar House, they are miles ahead of any other mass market caviar supplier (if selling at USD1000 per pound can be called a mass market).