Any market. USA domestic preferred but international is okay.
Have heard y'all raving about USAmp. I'd look into him but he seems out of stock. Plus I'd rather get sulphate in paste form, from what I'm reading it sounds like you only need a small amount of amphetamine phosphate, like it's more potent I suppose, n knowing myself I'd end up giving myself a heart attack doing sulphate-style lines.
Might try him in the future when he restocks, but until then, suggestions?
Edit: has anyone tried the vendor listonishereusa on Nucleus? They're domestic and the prices are good but I gotta know quality, considering the smallest quantity listed is still rather large.
PalaceGarden on Nucleus is a reseller for SuperSpeedBros which ships from Canada. SSB's amphetamine sulphate is the best shit I've ever used and would say its very comparable, if not better than adderall. I know you were asking for US Domestic but honestly you wouldn't get anything better besides a SSB US reseller. I would highly recommend them! edit: it comes dried so you don't have to worry about it, like I said though. Best product on the markets.