Advice before offer

I purchased a home in Bed Stuy last year and a friend of mine and her husband have expressed interest in purchasing a home as well. We’ve gone around to open houses with them and given them our advice based on the things we’ve had to deal with in the past year. They want to put an offer in on a home near ours but something seems off to me. The property was listing in January for one price, three months later reduced by 150k then taken off the market, switched brokers and now listed for $200k less. To us the house looks like it’s in good condition and has been well maintained, no glaring issues. It’s one of the least expensive renovated (but with original details) homes in the area and it seems the owners are eager to move. What questions can they ask the brokers or what advice can any of your provide prior to them making an offer? I would love for them to get a great deal but this seems a little too good to be true.