I used a few companies before. All give me 1 yr labour+medical insurance plus HK body check. Their prices are 1380 (in Central),2000, &1380 (2 in North Point) respectively. I fired the maid I paid 2000 for, so price does not guarantee quality.
You pay when u sign up the maid, not when visa issued.
This agent is expensive. Up to you if they have the only maid u want. If u shop around, this one may be taken.