There is a pretty good (35% off) sale of the similar Sennheiser CX 400 BT at Amazon and Crutchfield, for $130. I ordered from Crutchfield since they have a 60 day return policy compared to Amazon’s 30 day. They should arrive in a day or two. Same drivers as the Momentum earbuds, but without the Active Noise Cancellation of the Momentum 2, or the Transparent mode of this earlier Momentum model.
I own them. You will love them. However, be prepared to charge them frequently. They will drain in the case.
Ask if you have more questions.