1969 Plymouth Barracuda Fastback

Who has the title?

I have the clear title in my name from the lein sale back in Dec 2010. Turns out this guy stored the car at the owners yeard/shop and did not pay his bills . The owner of the shop (who told me it was her Husbands car that had died)put the car up for sale and that's when I bought it and spent all the time getting it out of the building .
The guy was notified at the time of the lein sale as per Calif law and did not respond( he just told me he has lived at the same address for 5 years ) , he then had 40 days after that to question the sale . He called me a couple nights ago and said , "Hey , you have my car" , so I went to the person who did the lein and she said no problem. Then I went to the DMV and asked if I was in the clear , again, they said YES , Steve Dameron owns this car outright . This guy calls me today and says , you should give me back the car for $2000.00 or I will work against you . I tell him I will sell you the car for $3500.00(just about what I have in the deal) and all is good with me . He says no dice , so this is what happens now . I asked him why some one who is storing a car for three years does not non-opt it ( you know he got the notice once a year for the reg from DMV ) , no response .

I got to ask you guys , what makes me the heavy in all of this ?????

Steve