For those that have little to no experience with small multi-family properties, like duplexes, are prone to making judgment errors as they try to understand that market.
What is market value? It is not a number, could be a range and it can change OVER NIGHT! Someone who says I am going to sell 10k over market, might be changing what market value is.
I don't know the Crosby area so it would be hard for me to give an educated input to the specific valuation. However, in my 15 years buying multi-family I can tell you I have seen this market go from very little demand to where we are in Austin in that small multi-family (duplexes) are hotter than any property type out there.
Duplex investing has evolved and is difficult to make an apples to apples comparison to the SFH market. 17 years ago when I started investing in duplexes it was almost exclusively investors buying. NOT ANYMORE. In the Austin MSA, I can't find my 1% rule which I used as a starting point for looking because it was so easy to find.
Case in point, I mentor several people in the Austin area (for the cost of a cup of coffee). A young man wanting to get in the market has been looking for about a year, considering all different types of properties. Yesterday he puts in an offer on a 320k listed duplex bringing in $2400 monthly rents. As an investor, I would not even consider this one but for him, it would be a good buy. He is renting a one-bedroom apt for $950 (no garage). The duplex is 3 beds 2 baths 1 car garage each side built in 1999, in good shape. He goes from shelling out $950 a month to now he's out of pocket for $200 less. He becomes an owner and if he wants to rent out one of his rooms on his side he hits a home run. Market values change rapidly in the Austin MSA. Duplexes I own in Austin have more than double in tax assessment in 24 months. Your typical buyer of SFH is still owner-occupants. Buyers of duplexes are a mix of owner-occupants and investors. In the Austin area, I am seeing more and more owner-occupants as buyers because as a pure investor they are getting too expensive for the buy and hold investor. When you have a mix of different type of buyers, with varying motivations, it gives rise to volatile market movements.