I am just wondering if anyone has a suggestion of best place online to purchase a new raypak pool heater. Looking for P-R406A-EN-X which would be a replacement for my current model except this one would have cupro-nickel. I do not need installation. I live in South Jersey between Atlantic City and Philadelphia. Just wondering if Amazon, Walmart etc... are just as good as any other online store or if there are some to stay away from? I am looking locally as well but not sure if there is any advantage to a local purchase over an online store. Any suggestions or information for this type of replacement purchase are welcome. Can I expect the new unit to come with everything that will be needed to swap out old unit and are there any caveats I should be aware of such as older stock or receiving incorrect model etc...