Sonoline B user here too. I actually didn't know the brand of mine until I compared pictures. I bought it in 2009 for my first pregnancy. It was $80 on ebay.
I actually rented a high quality digital one from Heartbeats at Home. My sister just had a stillborn at 30 weeks and we have the same doctor, so she wrote me a prescription for one in case I needed it. We just used it last night and there's nothing better
Re: doppler queston
BFP #1 : 05.08.11 : EDD : 01.16.12 : DOB : 01.15.12
BFP #2 : 12.26.12 : EDD : 09.08.13 : DOB : 09.03.13
My new bff Gayle Forman!