dont forget you will have to swap out the 10 round mag on the SKS also...just another added cost.
and if you must scope it
http://www.surplusrifle.com/reviews/choatesksscope/index.asp one of these. or a scope mount that replaces the rear sight.
The dust cover ones are for range fun only.
Yugo SKS 350.00(about as cheap I have seen them)
after market stock cheapest about 75.00 If you are small frame person the original may fit ok,
Scope mount 35-100.....with some skill and careful placement you can install a AK style side rail and use the pb-02 low mount more money though
scope ? 100+
5 round mags 8.00 plus most likely need to modify the rifle to fit.
If you have a short distance from your cheek weld to eye ball like me you will need a wrapid comb or some type of comb riser 30+
Cheap is always more when you try to make something it is not...
on sksboards there's a section on hunting
http://www.sksboards.com/smf/index.php?board=11.0
europe and russians use the 7.62x39 cartridge for hunting but not in a sks.