The real estate market is declining, and apparently some homeowners are more disgruntled than others:

A man upset about a property transaction fatally shot a real estate agent in the head during a meeting Tuesday morning in the victim’s office, authorities said.

Troy VanderStelt, 34, was pronounced dead at 12:45 p.m. at Mercy Health Partners Hackley Campus in Muskegon, said Muskegon County Prosecutor Tony Tague.

A suspect was arrested a short time after the shooting at a home in nearby Norton Shores. Tague identified him as Robert Arnold Johnson, 73, of Roosevelt Park.

So what set off Johnson?

Tague told WOOD-TV in Grand Rapids that Johnson believed that VanderStelt took advantage of him in a real estate deal. Johnson bought a house through him in 2005, then recently decided to sell it and went to a different real estate agent. The second agent told Johnson that, because of the slumping housing market, the home was not worth what he had paid for it.

The actions of Johnson were clearly unjustified, but this should be a wake-up call for the National Association of Realtors, who continues to assure consumers that "It’s always a great time to buy".

Consumers should be made aware that all investments carry some degree of risk, and the NAR should make educating homebuyers a priority- if only for the wellbeing and safety of their members.

 (twist thanks a Doom commenter for an important correction)