It sounds like a steal, but the Great Falls house formerly occupied by Bernard C. Welch, convicted murderer of Washington cardiologist Michael J. Halberstam and alleged burglar of hundreds of area homes, is still on the market at the bargain basement price of $975,000.

"There are not really any nibbles," reported real estate agent Faye S. Drennen, adding that high interest rates aren't the problem for the property, originally priced to sell at $1.3 million. "Generally, people in this price range aren't too concerned about interest rates. They pay cash."

The hangup, according to Drennen, has been getting prospective buyers into the 7-bedroom, 6 1/2-bath home that sits on nearly two tree-shaded acres. Linda Hamilton, Welch's common-law wife in whose name the house is listed, was "concerned about sightseers," Drennen said, and limited the listing to a few brokers. "Now, it's wide open, so to speak," said Drennen, and agent in the Falls Church office of Shannon & Luchs.

Also blamed for the lingering listing was an unsightly stack of construction material lying about from a still incomplete expansion of the rambling home. The addition includes a 43-by-77 foot room with swimming pool and 14 skylights. With the place cleaned up and easier access assured, she predicts, "We would hope to sell it within a month."