For those of us who ordered from healthtex with last week's deal of $12 items...
You can return to the site & re-select your items (if still avail.) add them to your cart & work out what the difference would be if you purchased them at the current rate. Then call Healthtex CS 800/554-7637 and they should have no problem crediting you the difference. I saved over $7.
Since they informed me that it will take 1-2 billing cycles to show on card, i printed my lower rate shopping cart showing what was avail. and the item's current price for future reference.