It says:
up to 30% off when you grab five or more.
3 Likes
An even better deal: Thru June 30th you can save 50% on up to 10 DSD albums and get a free AXPONA DSD64 sampler. NativeDSD has over 3300 DSD album downloads to choose from including Octave Records. Details here: https://www.nativedsd.com/axpona25/
Enjoy the tunes! 
The discount is for SACD only, downloads do not get discount.
HDTT has a 25% Summer sale now, and I bought a few.