I have a barely used AP CCDT67 telecompressor which gives .67 focal reduction. plus 2 x 1/2 inh threaded extension sections to help achieve the right compression or gain more compression plus a 2 inch tapered nosepiece for easy connection to a 2 inch eyepiece holder.
There are a few minor marks on the barrel from where thumbscrews were used but basically its a new unit apart from that as I used it as an experiment to achieve focal reduction on my CDK17 scope and it was not intended for that.
Its commonly used on RCs and refractors.
New cost for all the parts is AUD$475 I'd sell this for AUD$300 including postage to Oz.
Here is a link to the AP website page:
http://www.astro-physics.com/ look under photographic and ccd accessories/optical accessories/ccd telecompressor (CCDT76).
Greg.