A lot of items are overexpensive here, especially cameras.
But if you're talking about computer parts, the prices here are comparable to those of europe, so it's not that bad. You can see the prices here
www.pcandparts.com
If I bargain with my usual parts reseller, I can even have lower prices.
Of course, that's not the prices they have in canada and the US. Forget it, it's a whole different world over there.
If you want to order items online from sites that do not ship outside the US, check MBE's service:
http://www.eshop-lebanon.com/
You ship to their address in the US, and they forward it to lebanon.
You can also use their credit card, since american e-commerce sites usually do not accept to send the shipment to an address other than the one on the credit card.