I've been watching these for a while and this is the first price drop authorized by Bose on their newest model of portable speaker. It's a modest price drop of $10, but this is rare of Bose, and it can be combined with other offers for extra savings.
Available at multiple retailers, most notably:
($99.99 and save an additional 5% instantly with RedCard = $95)
($99.00 and combine with ChasePay offer to get an additional $20 cashback through Chase Ultimate Rewards = $79)
($89.99, available in Black only)