The Octave Records site will tell you what various charges are, will give you a (bogus) total, and will charge your card for a completely different total.
For example, when ordering the Audiophile Guide SACD, it said this:
Note - $29, $7 shipping, $4 sales tax but a total of $32.
I thought perhaps PS Audio had a deal going on so I entered my card info and continued with the transaction and… I was just charged $39:
This can’t be normal and certainly is unexpected.
Note I sent an email on April 10 asking about this discrepancy before making a purchase and received no reply.