Memory cards have dropped in price. If you don't need the absolute fastest card in your camera -- and for most shooting, you don't -- then prices are down to record lows. Very reliable, fast cards are now inexpensive.
Last I looked, for $30 you can get a:
SanDisk 2 GB Extreme III CompactFlash Card
Not that long ago, those were going for about $200.
Or for $25 you can get a:
SanDisk 2 GB Extreme III SD Memory Card