Are the prices more expensive at the HEB store? The normal price for either of these models isn't really that out of line.
Granted, the Metro refils ARE overpriced at $10 for 3, but the $20 kit is actually a deal (Battery, USB charger, and 2 cartos).
A 510 kit regularly goes for about 35.00, then add to that the 25.00 to 30.00 for a PCC, tour getting close to the Blu starting price.
The Blu may be a little more, but atleast its not like the mall venders.