I sure know the feeling... Yearsago my MIL asked me to make some blueberry jam for her church bazarr, well I did. I used the 8 oz. Mason jars with the pretty lids, at that time it cost about 1.50 to make each one of them. I made a dozen and sent them to the church. They sold them for 25 cents each!!!!!! Lesson learned.... Just give them a donation next time, as what I did!!!!!