These tend to be unsecured and/or to unsophisticated investors which, to me, is gambling.

Hit the "spam" button on junk like this.

If you're not looking at a timeframe of at least ten years, you're not investing, you're gambling. 

You just don't know if your investments will pay off and that is the gamble.

It's a gamble.

He really doesn't like you and has been spamming a bunch of posts with this message. 

But its not unlike gambling in a casino.  

So many others "settle" and take the deal in hopes for higher sales prices in time, they are literally gambling on continued appreciation to take the deal down.

I got 750 bogus spam seller leads from my website in the last couple hours and they keep coming?

Don't get me wrong; there are plenty of issues/problems/quirks that old houses have that new houses don't, and an old house can obviously have hidden problems and big repair/maintenance bills too--which is why thorough due diligence is fundamental to REI...but, the point is: a brand new house is not a foolproof solution to repairs/maintenance headaches (and in some cases, a brand new house can be a much bigger gamble than an older house).This is a particularly important lesson for inexperienced investors, who tend to be the most prone to "shiny object syndrome" (the tendency to let nice aesthetics distract from real, underlying issues).