Ouch!
I just had a litre mixed up of a very dark blue pearl and it was only about $93. Thats in Debeers Berobase with a lot of dye and pearl added. Its unlikely you will notice any difference between the brands.
My new thing now when i buy stuff is to say 'oh im glad i got here on (insert day)'. "Why?" they usually ask. "Because thats when you have these on special, i read it on your website'. Discount usually follows with a laugh. Sounds stupid but seriously try it.
My Por 15 order dropped 20% when i did this last week.