I have an HSA insurance plan where I effectively pay out of pocket, so I'm starting to get more and more tempted to buy non-US drugs for which I have or could get a valid US prescription. Not particularly drugs of abuse, but something like ciprodex (ciproflaxin antibiotic + dexemethasone (steroid) otic (ear drops); $140 in the US and $55 in Canada). Stockpiling some other drugs (tamiflu, etc.) might also be tempting.
The only drugs I see on SR seem to be psychoactive, either research chemicals or boring prescription psychiatric drugs like xanax or adderall.