For off-the-shelf electronic parts in small quantities, everybody orders from Digi-Key, or maybe Mouser. Order by 8 PM Central time, delivery by 10:30 AM the next morning if you pay for FedEx.

That's what wiped out local parts stores. You never knew what they had in stock, and the markups were huge.

Also, Digi-Key doesn't have a counterfeit parts problem. Digi-Key deals directly with manufacturers. The supply chain is simple and has no anonymous resellers. If someone finds a bad part and reports it to Digi-Key, their systems can trace it back to the manufacturer lot. So not many duds get through.