Best Buy has UE Wonderboom 2 in the "Concrete" color on sale for $69.99, down from $99.99.
This is the current version of UE's portable bluetooth speaker. The previous version (Wonderboom) is on sale too and is a current Frontpage Deal at $40. This appears to be the first deal on this model.
This article has a good comparison between the two if you are wondering about the difference: https://www.technobuffalo.com/ult...wonderboom
There appears to be some dispute between reviewing sites whether this is waterproof or just water resistant. See, e.g.: https://www.techradar.com/reviews...nderboom-2