Find out how much it is worth for scrap value, and in your Craigslist/Ebay ad, mention the positives such as the complete supercharger setup for a core (even if it doesn't work, it is complete and that does make a difference) a Hydramatic, and usuable fenders, doors, trim, (even the 54 taillight bases have some value higher than zero). Estimate a core Supercharger value, and the scrap value and base your price on these factors--AND state in your ad what those values are. So, if its $500 + $150 for example, then you might expect $650 or better, and price it accordingly. So if someone wants it just for a rebuildable supercharger, have them take the whole car and they can strip off/sell bits/keep stuff/scrap the rest themselves.
JUST for our information, could you post the information/serial number on the driver's door post between the hinges, and underneath the hood on the cowl there should be a plate with all sorts of information with such things as TRIM SCHED ITEM etc? ....all those numbers mean something.