I'll chime in too but about balsamic vinegar since someone else mentioned it. I've purchased store bought massed produced balsamic vinegar, American produced ba

I'll chime in too but about balsamic vinegar since someone else mentioned it. I've purchased store bought massed produced balsamic vinegar, American produced balsamic vinegar made in Napa, and DOP regulated balsamic vinegar aged 24 years from an acetaia in Modena. The difference between the first two is enormous. Massed produced balsamic vinegar is quite runny and quite "shallow" in favor. But between the latter two, the difference is much, much more subtle. For some things I honestly prefer the Whole Food purchased, produced in Napa balsamic vinegar I picked up for about $10 because I can really be a little indulgent. The Modena balsamic vinegar is almost too precious to use because the bottle is TINY and costed almost $50 (price I paid in Italy; double that if in the US). I mainly use it for special occasions or to flatter dinner guests. Also, Costco's IGP regulated balsamic is pretty comparable but I've found that their quality actually differs quite a bit between brands despite being regulated. But it's like $14 for a big bottle.