I don't understand with what right trader Joe's can prohibit somebody from reselling their products. If he clearly states where he bought them from, and that he is not affiliated, and doesn't misuse their trademarks (impersonate them), it should be absolutely legal.
A side remark, people often say how great the US / north America is for entrepreneurs, compared to (continental) Europe where there is a lot of red tape and regulations. But in my opinion, if I were to do this in Germany there is no way ALDI (whom trader Joe's belongs to iirc) could sue me out of business. Not even with the old frivolous "we are wrong but you can't afford the defense" trick. There is just so much legal uncertainty in NA that it would give me nightmares doing business there.
A side remark, people often say how great the US / north America is for entrepreneurs, compared to (continental) Europe where there is a lot of red tape and regulations. But in my opinion, if I were to do this in Germany there is no way ALDI (whom trader Joe's belongs to iirc) could sue me out of business. Not even with the old frivolous "we are wrong but you can't afford the defense" trick. There is just so much legal uncertainty in NA that it would give me nightmares doing business there.