Here is a link for shaftmasters for the 240sx category.
Nissan 240SX Driveshaft Replacement
and here is for the Driveshaft shop
The Driveshaft Shop | Nissan - Import Driveshafts
i say price wise, they are pretty much in the same ball park.. but The driveshaft shop is a bit more expensive... i seen more positive feedback on The driveshaft shop DS and i never heard of shaftmasters... so me personally i would go The driveshaft shop.