I researched that yesterday. Petrossian is an importer and distributor of caviar so "Petrossian caviar" can be anything they sell. They list "caviar" from about $900/k to at least $7400/k, so if you stick to mostly the cheap stuff you can still advertise "Petrossian caviar" and keep the price down.
Of course I don't know how much recognition and prestige Petrossian has outside New York City.