Where do you purchase your canning supplies?

Hello! I am newer to this and need a little help, if you have the time. I am making jams in 8-ounce jars. What have you found to be the best price in buying jars, lids, and rings? I understand I can buy all of these branded items at my local grocery store (and offered online). I also see non-branded supplies on Amazon which have good reviews and are quite a bit cheaper.

In short, what do you use and where do you buy them to ensure you are getting the best price possible?

Thank you!