According to their monthly newsletter, Costco says that Theo is making a "limited" (as limited as anything that is sold in Costco can be) edition Valentine's Gift Set.
This follows a trend for well-known chocolate companies to sell their wares through Costco. While probably less destructive to the bottom line than selling through WalMart, the fact that people can purchase the chocolate at 20% normal retail prices would indicate that Theo is not making its customary margins.
The Gift Set is actually pretty extensive and would make a decent introduction to their products for an emerging chocophile: 5 origin bars, 6 flavored bars, and 6 bob bons. The article does not give a price, you'll either have to go online or into your local Costco to find that out.