買いたいと思える商品はないって英語でなんて言うの？

この場合、次のような言い方ができますよ。
ーI wouldn't want to pay for any of them.
「どれにもお金を払いたくない」

ーI don't think I would buy any of them.
「どれも買わないと思う」

例：
I don't think I would buy any of them, but I would take them if they were free.
「どれも買わないと思うけど、無料でくれるならもらうよ」

ご参考まで！