I have the BD brand sold by Rite Aid. I LOVE it! I got it for $7!
I had a different one from Rite Aid before and I am not sure the brand... but it says Bestmed on the back of it. I kept it for some reason when it died. The BD one I have works sooo much better. The Bestmed one died after about 5 months. I feel like this one is sooo much more accurate. With the other one I could temp and get one reading and then temp again right after and get a WAY different reading. With the BD one if I temp back to back I am usually only off .1
I remember the day mine died. I was close to O and pretty upset. It died around midnight when no stores that sell BBT's around here are open. Poor DH even called ALL the local grocery stores that are open 24 hrs.
i found the one I have online for you so you know what it looks like.....
http://www.medshopexpress.com/096901.html