RiteBrew has great prices for CO2 Manifolds.  All have integrated check valves and either 5/16″ barbs (fits 1/4″ and 5/16″ ID tubing) or 1/4″ MFL connections.  2 to 8 way manifolds are available starting at just $19.49.

The 3 way barb version has dropped $1 to $26.49 and the 8 way barb has dropped $4.50 to $66.99.

Check out the Full Lineup

Also from RiteBrew:

Perlick Forward Sealing, Stainless Steel 630SS Faucet.

843165 – Perlick Perl Faucet – Stainless Steel – $39.49