if you live in US then it's a lot cheaper to buy here and send it there.
Normally laptops, flat screen TVs prices are more than three times in Kathmandu.

This is because of the high custom duty, transportation cost, profit margin, etc the seller will charge.

so even if you feel like you got a good deal in a laptop then there is a high probability that the laptop is several years old and out of date with the current technology.
also you don't get what's just released in the west right away. even if you do get it then again the price will be very steep.

personally I wanted to buy a big sony LCD tv in kathmandu, but the price at the sony's own authorized dealer in Kathmandu was so high that I made up my mind just to buy a good quality projector for a lot less price in the US. The reason being you can just easily carry a project with you.

however if money is not a concern for you then there are bunch of computer stores in Newroad area which sells laptops.
just walk into some they are concentrated in one area. also it's normal to negotiate price in kathmandu. they don't have like set tag price there. Still even after the whole negotiation thing, you will be spending a lot more in laptops compared what you would pay overseas. One of the main reasons being the constants SALE events here.