prices can go through the roof
...and then [link=http://shop.singahobby.com/?q=node/13454]keep going...[/link]
How about $3738.00 for an ARF airframe? Not at all difficult to spend more than $6k for a ready-to-fly model.
Stock Focus II with all stock hardware, SAP-180 with included Pitts muffler and decent servos could run well under $2k, maybe less than $1500 depending on what you already have in your parts stash. Might not make weight (i.e. under 11 lbs) and would not technically meet noise requirements for pattern competition, but would make one heckuva fun sport plane!