I'm selling a mint MMC1 cartridge in mint condition with round case and all accessories including mount adapter, brush, etc.
Guaranteed to work.
I know buying these can be a problem on ebay but here you go from a fellow beoworlder.
EDIT: Decided to list on ebay, NO RESERVE AUCTION, HERE YOU GO:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110522990447&ssPageName=STRK:MESELX:IT