My boyfriend and I are looking to buy an at home fetal doppler and was curious if anyone here knew where they had them for cheap but work good. We want to be able to hear the heartbeat and share it with his parents.. He also feels it will keep my mind at ease..

I bought one from buybuy baby called a "prenatal heart listener" and it doesn’t work for as early as I am. I am 13 weeks. Is there any stores other than online where I can buy an actual Fetal heart doppler? Also any suggestions of a certain brand or kind to get?
The prenatal heart listeners dont work.. i need an actual doppler