Used works performance shocks are the best bang for the buck
depending on your bank, $200 or less is a good deal on them if in decent condition.
search for works front shocks for blaster, warrier or banshee. rear shock can be 400ex 450r or 250r.
many people run stock 400ex and 450r rear shocks because they are better.
i honestly wouldnt buy one myself but it is cheap (50ish) also need the $25 bushings to make them work