I buy, pots, knobs, trims, IC mounts, resistors, transistors, LEDs, and enclosures from Tayda regularly. I like them, in general, and the shipping is cheap to the US.
I especially like the way their resistors come (strung together like a native American chest piece). It makes spec-ing them all in one pass easy. I have occasionally gotten resistors that are out of spec, but I usually buy a lot and I can just pitch the bad ones. I also really like their enclosures, but others here do not like them. I'm not sure they are powder coated, the paint is really thick.
I buy chips and caps from Mouser or equivalent. I have bought chips from Tayda, but I had some trouble with a PT2399, so, decided not to risk it.
I buy switches and jacks from Lawrence (BLMS) and all the hard to find stuff from Small Bear.