Greetings to all Super 8 enthusiasts!
For those interested in some Super 8 sound cartridges I have 3 for sale here that were always kept frozen..
http://www.ebay.com/itm/3-Sound-Super-8-rolls-Kodachrome-always-frozen-/221979312795?hash=item33aeff829b:g:m~gAAOSw5IJWgF-K
If nobody bids against you all 3 are yours for $7.70 plus shipping (regular or expedited).
Bear in mind that there is no more color Kodachrome processing that I am aware of, only black and white negative processing - see listing for more details.