248,106kms recent money has spent on the car but $30K does seem top dollar for a W116?
http://www.ebay.com.au/itm/1975-Mer...-/171569593414?pt=AU_Cars&hash=item27f2583c46
http://www.ebay.com.au/itm/1975-Mer...-/171569593414?pt=AU_Cars&hash=item27f2583c46