SS sink for a boat... $1000.
http://www.defender.com/product.jsp?path=-1|51|26723|824293&id=133460

SS sink for an RV... just about the same as the boat sink above... 5 inch depth vice 8 inch and not the same high polish. $85.
http://www.camperpartsworld.com/RV-Sink--Stainless-Steel-Double-Sink-25-x-15_p_13597.html

Wow, tell me that it is really that hard to put on a high polish finish.

For the 10X difference in price... the RV sink seems like a great bargain.