Hi Mel,
It looks like your domain has had a very chequered history with lots of transfers over the years. So what Gabriel said is a pretty good assumption.
A "whois" search confirms you own it through to 24 Nov 11 and as you say, transfer is locked.
There are heaps of domain name scams around and a Google search will unearth many aimed at the users of Sedo and other domain parking services. Eg:
"Domain valuation scam targets Sedo users"
http://www.thatdanny.com/2009/03/08/...ts-sedo-users/
Then there is...
"Sedo Fined 95,000 Euro’s By A French Court For A Parked Page & Ordered To Post The Verdict" (2010 March 11)
http://www.thedomains.com/2010/03/11...t-the-verdict/
Regs,
JohnW