With that money you have a few options. Upgrade the sway bars, Suspension Technique is decent product for the $$$, I use them on my 91 Si. Another option would be decent struts, Tokico HP's, and save up for H&R's springs and install.
With suspension parts, price HIGHLY reflects quality. Cheap Ebay parts are for looking at not for function. Spend the $$$ and do it right the first time.