All components rotted with worn finish .Unknown foundation status , with uprights set on blocks and wood.

Make sure you have enough money set aside for the unknowns like vacancy, appliances, etc.

@Alex Shin I’m hoping the best for you but like a few have mentioned there are a few unknowns that would help.

And thabk you for future input.So, i have a property here in las vegas bought about 11/2 years ago for exactly 270,000 (owe 242,000 on it now).The houses (including my own) now valued around 340-370 (mine on zillow says 355k) my home is a 4 bed 3 bath 2560 sqft 2 story build 2015 (has 10 yr builder warranty) corner house in gated community...My original plan was to live in it while we settled into vegas, then rent it out and go buy another house however not only is the market here in vegas at an unknown is it going to continue to go up or down etc.

Now a secret storage space a few inches deep the entire width of a wall can certainly exist unknown.

Once you've done a deal or two you can step out into the deeper waters of unknowns like this one. 

If you cannot get into the property you need to bid taking into account the risk of unknown condition inside. 

In your opinion, which are the "steps to follow" when approaching an unknown investor to offer a deal?

@Sami Gren here a lot of unknowns in your question.

Unknown what if any steps prior owner took regarding ejectment lawsuits.