I'm curious to find out what a fair price is for a used '54-58 pressurised 235. I have an ad for an overhualed '55 235 with 10-20k on it for the sum of $750. It looks like it comes with the bellhousing, carb, etc. mostly complete. I'm looking to the future and would like to upgrade to a 235 from the 216. I haven't had much time to scan ebay or other swap meets to see what the going rate is. Any ideas?