id say maybe 500 for everything lol but then again im a bargin hunter you can get teh jdm d15b which is loads of fun for around 500 form most any jdm motor dealers....
http://www.hmotorsonline.com/shop/sc200 ... item=30021
ok maybe liek 600 but yea id say 350 for just the motor 425 seems a bit much but i mean if its guarenteed low miles maybe.....but you will need a ecu to work the thing.....
http://richmond.craigslist.org/pts/1699844159.html
"single cam non vtec motor runs all there garrrentee to run very well no leaks no taps no knocks.. 150 thousand miles. every thing all there but tranny."
http://richmond.craigslist.org/pts/1670494517.html
Cant remember if the D17 will bolt right in or not but for 400 i think it was comes with motor and trans....tho he says 2000year model civic so could be a D16y7 which is also sweet
but yea to answer your question a JDM D15b would be worth maybe 500 from a jdm dealer but id say 350 if someone used it unless you get a worry free warranty.....