Hey Jan,

I have one that bought second hand. Its the deluxe model one sold by Fertily Naturopath online. It has the digital display of the heart rate.

I got to hear Junior's heart beat from 11 weeks. I can find it every time I use it even though it may take a few minutes. You will get to learn the position of bubs.

I paid $100 second hand for mine and I think they around $220 new. HTH