Today I tried every CVS within a reasonable driving distance to find the Nova Max with the 20 ECB's no luck

At this rate when I find one I will have earned every one of the ECB's for time spent just locating one.
I have 14 ECB's and would like to roll them over this week with a profit but I am having trouble figuring out how to do it. Any one out there willing to help a newbe?
I have coupons for Mrspinecone from her wish list but have no privileges to contact her yet can...