A new survey of real estate agents by online-centric brokerage Redfin indicates the market may be shifting away from sellers, with 65 percent of agents thinking now is a good time to sell, compared with 72 percent in the third quarter and 86 percent in the second quarter.

Agent’s perception of the market for buyers stayed steady, with 56 percent of agents saying now is a good time to buy compared with 55 percent in the third quarter.

The shift in sentiment is driven by continuing constraints in inventory combined with rising interest rates. Buyers and sellers are faced with slim pickings when it comes to finding their next home all year, but the increase in interest rates in the second half of the year has lessened both buyer’s pocketbook power and their sense of urgency. In the fourth quarter, 87 percent of agents surveyed cited "limited inventory" as the biggest challenge for buyers. But only 65 percent of agents surveyed cited competition from bidding wars as a major concern, a decline from 79 percent in the third quarter.

"These days, finding the right home is more difficult than ever," Redfin agent Marcus Fleming said in a statement. "With such limited home inventory available, buyers who need to move now often have to compromise on upgrades or location to find a home that meets their budget and basic needs."

Many buyers are ready to make concessions for the right home: In the fourth quarter, 35 percent of agents said that buyers are "willing to pay more" to find a home compared with this summer. At the same time, about 30 percent said buyers were "flexible on features," held "lower expectations" for how far their money will stretch, were "looking to new construction" because of limited inventory and were "prepared to waive contingencies" to win a bid, according to the survey.

Data was collected from Dec. 12 through Dec. 14, and reflects responses from 468 Redfin real estate agents in 22 major metropolitan markets across the U.S.