AMDZone has reviewed and compared some Kingmax PC2700 256MB CAS 2.5 memory :
With a price of only $68 shipped, the Kingmax stick is a few dollars cheaper than Crucial. If you don't plan to overclock the Kingmax stick is a better deal, but overclockers will be able to get a few more MHz out of your system with Crucial. The difference between the two is minimal and I'll leave that decision up to the buyer.
I have a few more sticks of ram coming up to be reviewed, meanwhile Crucial is the best overclocker and Kingmax has the best Value