For the professionals there will always be component suppliers, but for the hobbyist there is a problem...

You want 4 x 1k 1/4W, 3 x 33k, 1 x 8K2 and sixteen other values... half a dozen capacitor and a couple of Transistors. You hand the list to the shop assistant and half an hour later he comes back with your $1.85 worth of parts whilst costing his employer $8 in Labour. The figures just don't add up anymore. A box of 1000 resistors costs under $5 but already I can hear the hobbysists and students on the forum rioting "but I don't want 1000 of the same value"!!!! So suffer... instead of that Resistor costing you 0.5 cents, you end up paying 20 cents for a 1-off. You won't pay the money, and stop going to the shop, the shop closes down and everyone moans that the hobby is dying....