I used CBEFM and I really liked it. I also charted at the same time, but that's b/c it took us a while to get pg, so I was keeping pretty close tabs on everything by the end (we were about 2 months away from seeing an RE when we got our sticky baby). Not selling (mine was used when I got it, so I don't think you'd want one third hand anyway...) but I definitely recommend!
Re: Fertility Monitor
I used a clearblue easy fertility monitor I actually need to get rid of.
Just send me a PM.
I used CBEFM and I really liked it. I also charted at the same time, but that's b/c it took us a while to get pg, so I was keeping pretty close tabs on everything by the end (we were about 2 months away from seeing an RE when we got our sticky baby). Not selling (mine was used when I got it, so I don't think you'd want one third hand anyway...) but I definitely recommend!