Sharon Tate's sister is disgusted a guy is trying to make a buck off the door to the home where her sibling was butchered ... slamming the whole sale as immoral.
DebraTate tells TMZ ... the current owner of the door, Christopher Moore, and the auction house through which he's peddling it, Julien's Auctions, oughta be ashamed of themselves for trying to profit off the murder of the late actress, who was 8 months pregnant at the time.
It goes without saying, there's a very dark history behind this former piece of the Tate house ... and Debra hopes whoever ends up buying the front door knows this, and realizes it isn't something to gawk at or marvel over. On the contrary, she says it's morbid.
She tells us the door should be destroyed, and the only reason it's even being sold and generating interest is due to the shock factor -- something Debra laments.