If you want to rechrome "everything",
sit down on a chair first.
4 x bumper halves, complete grill, about 20 outside chrome strips, window surround, hubcaps (230/250 SL), headlight bezels (Euro version), some or a lot of interior chrome, hardtop ...!
Can fetch up easily 10,000 $$ or more - depending on the quality you are expecting.
My 2 cents .... wait & be patient.
Ask where other fellow owners you meet in person had their items rechromed - and decide then.
Good luck !
Achim
(still lots of chrome missing on the parts)