I've had a Sven saw for about 20 years (sheesh, has it been that long???) that I use for camping. It only cost about $30 or so new, and I've certainly got my money's worth from it.
It has gotten a little dull over the years (though it's still pretty darn sharp considering how many logs I've cut and never sharpened it....) and so lately I've been looking for a replacement. One of the great things about the Sven saws is that not only are they razor-sharp, but they fold up into a nice small package great for camping or especially backpacking.
In looking for a replacement I came across these pruning saws by Corona http://www.coronaclipper.com/index.c...category_id=27
Man, are these little suckers sharp! I can literally cut through a 4" log in about 10 seconds! Their blades are quality steel, and feature the Japanese-style pull stroke cutting that IMHO is so much better than push cut or even cross cut blades (much less effort--much faster cutting). Between the pull-cut and the curved blade, these saws go through wood like a hot knife through butter! Our local Jerry's (our equivalent of Home Depot) has them for only $19.95, and you can even buy a nice nylon/plastic sheath for the saw for only $9. (http://www.coronaclipper.com/index.c..._category_id=1
The Corona saw and sheath are roughly the same size and weight as the Sven saw, though true backpackers would probably be better off with the Sven as it is thinner.
I've been using the Corona saw for a few weeks now and while I'll keep my trusty Sven saw around for emergencies, the Corona saw is the simply the best hand saw I've ever used--all for only $20!!!