I wouldn't buy squat from Kommax.  They have a Resellers Rating of 
4.69 & a 'last six months' rating of 3.12.  It is richly deserved if they are the same outfit that goes by that name that attended a computer show in Oakland.  I bought a cheap box that said it was a PCI sound card from them.  It turned out it was an ISA sound card AND it didn't work properly and the mofos charged me a 15% restocking fee (sure, it was only something like $2, but its the principle of the thing, plus the interest).
These days the best deals on DDR seem to be after MIR packages from the big box electronics stores.  That is, if they actually send the MIR.  PNY is kind of lousy about that, scan all your paperwork.  
The best online deal on PC2700 from a company with an OK Resellersrating seems to be about 
$53 for generic from 1st Choice Memory in California.  Pricewatch lists an Ohio company called AmeriComp, Inc as having Samsung PC2700 256 MB of DDR for $58 delivered, but they don't seem to have a Resellersrating and their site lists the stick for $70.  
A company called Z-Buy (5.78/6.68 RSR but I've dealt with them a couple of times and had no problems) sells a 256 MB Samsung DIMM for about 
$60.57 and about $5 S&H from N.Y.    Things will being going hard for you if you can't get a Samsung or Valueram CL2.5 chip to do CL2 at 166MHz, I gather.  But you'd be lucky to get Mushkin Basic to do CL2.