While the various categories are excluded from laws of exploitation, does this mean that it is only at the halachic level of explioitation (1/6) or would it also apply if one exploited another to a higher degree (bitul mekach – where we generally say the sale is cancelled)? Various answers are given. One of the answers passed down in the name of Rabbi Yochanan seems to contradict soemthing he holds elsewhere. Various answers are provided. Derivations for the exclusions of these categories in the other laws in the mishna (double payment, laws of shomrim) are brought.