I'm no expert on gender politics of ancient rome but from what I understand women couldn't hold much political clout (they were unable to join the senate or hold office, but there were some women in local councils), but overall Romans cared more about status than gender. Women could inherit family wealth and run businesses as much as a man.
Ironically it was 'progressing' into Christianity that put more restrictions on women's roles.
So I'd guess a slave trainer (who's inherited his/her father's business - is that correct?) probably wouldn't have much of a difference compared to a man, except for probably getting belittled and men wanting to bone her. So yeah, worst prices but offers for her to sell herself seems likely.