I listed the used EHA on ebay. It is the last one I have and is good with no leaks. I had five of them and they are moving fast.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=290136775609&ssPageName=STRK:MESE:IT&ih=019
I think this is the only used EHA left on ebay.

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1992 400E current
1988 300E sold
1973 280C totalled
1973 280SEL never got it running
1971 250C my first love but rusted out