Hi David. This is an interesting response. First, to your point, I am both a realtor and investor but I am mostly an investor. Which market do you do your investing? I can almost say for certain that for beginner investors, there is very much an unwarranted stigma with listed properties, especially in the Boston area (I can't speak for other markets). I think this is in large part because of how the word "off-market" has become manipulated. A majority of the time in Boston, if you want to get an "off-market" deal, the asking price is higher than the price if/when they list the property because sellers know they can charge a premium for "off-market" in these hot areas - and this is misleading for beginners.
This essentially defeats the purpose of off-market deals in the first place. I put off-market in quotes because they're not traditional off-market deals (where the investors are going straight to the seller) but rather a listing agent that is advertising their off-market listing to their list of 200 buyers. So in reality there's nothing off-market about these deals to begin with.
And of course, the ideal investment is acquiring a traditional off-market deal at a great discount to market value, however, generally speaking, people are just using the word off-market to get investors interested but still ask for an outrageous price.