Remember, these people have a store front to pay for (and all the costs incurred thereof) , so chances are you wont get the price listed here, BUT if your good you should get within $5-15 dollars of the listed price.. (note: some vendors will give this price only because they can make it up elsewhere)
Remember SHOP AROUND, there is no one vendor who has the best price for everything. Some excel at MB and add on peripherals and suck at memory prices, others give you great memory and CPU prices, but suck at everything else..depends on the volume they buy and if they have family in the business overseas.. ;)
N.B. The memory prices for memory are updated weekly (only because the volatility of the RAM market -the prices DO fluctuate quite often) The prices for all other listings are updated bimonthly..
N.B.B.(The manufacturers listed next to the price can be found in Computer Shopper Magazine)
OK..on with the the show..
HAGGLING
(IMHO -If you don't haggle your probably a weak sap and you and your gene pool should be eradicated from the Earth. Haggling is very American, plus if you wish to gain ANY respect from the Chinese hardware vendors (they always have the best price) you had best haggle..less you want to be bent over and driven to Mexico..)