well if your only going to go with that much boost id suggest building your own turbo kit....itll be cheaper than that and your turbo will be alot more reliable i have heard nothing but bad stuff about ebay turbo;s but yea....
build your own turbo kit what you would need would be
a honda civic crx hf/std/vx/cx manifold
adapter plate depending on the turbo you choose to use
a turbo depending on your adapter plate
intercooler piping and intercooler either side moutn smaller or front mount larger.....
a good site to check out is.
homemadeturbo.com
here are some of their projects
http://www.homemadeturbo.com/turbo_projects/
and well yea id just look at it that way since yea its a decent kit comes with everything except injectors, and well a tune and stuff like that
if you peice together a turbo kit youll probaly need nomore than 3-400 depending on intercooler and turbo
may be a bit more work and research than just buying a whole kit off ebay but in the end it will save you money and heck if i could save 5 dallors and still have something that in the end i could feel proud of id save that 5 dallors....