You probably think that the difference between WAP (Wireless Access Point) and Wireless Client Card is a lot of money, since you see some "El Cheappos" PCMCIA cards offered for $50 or less.
In reality, to put a Wireless Client Card into the Desktop, you need either a PCMCIA card with PCI Adaptor ($40), or a USB client Card. Either of these cards has to of good quality to maintain a reliable connection.
So, it is really a difference between spending about $90 -$100 on a desktop client, or to find a WAP on sale for about $120. (Hold off on the brew and or the Whopper, and you make the difference in no time).