soshin trade (soko) has em for 800 bucks and on ebay starting at 700. i got my RR SR20 used with 54k miles for $320 bucks at a wrecker. as it is so called a "weaker" engine i didnt mine on making it work on my boosted b13 since it was cheap, we'll see how it runs on s3's .. im running that engine as a backup while i build my worn out Highport.