ClassicSelect is having a big sale. They have those often, I just never remember to post about them.
While there, check out the digital download deals also. "Box Sets" as low as $0.49.
It's not a fancy site by any measure (it's quite bad in terms of navigation, to be honest), but I've gotten some really good deals there. It's mostly Classical, but there are currently some Broadway cast albums on there, and they occasionally have Jazz collections, too.
For those who are interested in payment options, they take the usual credit cards as well as Paypal, Amazon Payments and Apple Pay, and as of my last order, they did not require creating an account to buy.