Is this something I should worry about? Or is this just Spectrum scaring us into buying it directly from them at a premium?
Heres option #3: It could be that the headshop scored such a helluva deal in buying it by the bulk, that they are not hurting their profit margin by selling at $19.99.

If you are concerned that the QF batch from the headshop may be bogus, you can always run your own validity test on the batch to see that the creatinine, S/G, pH, etc; are all within acceptable limits. These test kits are inexpensive and can be found by doing a Google search for "drug adulteration test kits"
Burnt Toast Reviewed by Burnt Toast on . Quick Fix sold at less than full price? I need some reassurance here.. I've used Quick Fix successfully 4-5 times and I have faith in the product. However, I have a test coming up this week for a new job and I'm disconcerted about the following blurb I read on the Spectrum Labs site (youreinluck.com): "If you have purchased Quick Fix at below standard prices you most likely have purchased an illegal, counterfeit product that will not work." Standard prices on the Spectrum site are $45.00 for the 3oz (QF Plus). However, I Rating: 5