I think those are electric senders- 6v or 12v? Should be about $100 for water, $100 for oil, and $150 for fuel. Maybe lower, maybe higher. You can do a completed listing search on ebay to get a better idea. If you want to unload them for $20, send me a PM lol.
6v. After further information on ebay I guess the last two fuel gauges on ebay went for 170.00 and 254.00. Wow who would of guessed that they are highly sought after. Thanks for the information