CPR cert

How much should you pay for BLS CPR certification? I'm in nashville, tn and this seems like the most reasonable price i've found so far: www.cprnashvillecpr.com . $35.00 for bls. I've noticed a lot of other places charging $50.00 and $60 +. Is there a difference between this and the other expensive redcross certs I've seen?
Most fire departments have AHA or ARC instructors and instructor trainers, and a mandate to do community outreach. Around here that translates to "cost of materials" and that's it. And they come to your venue. Put together a group at the Y or the church or the library or the Scout hut, and see what you get.

Thanks. I've looked into that somewhat. Most offer a "family / community" cpr class through the AHA ARC, but haven't seen any that offer the needed "BLS / health care" certification. I'll contact a few more just in case though. Just price browsing for myself and a few other students.