Moisture / water / mold, knob & tube wiring, foundation issues, ancient plumbing, rust on the breaker panels, termite tunnels, powder post beetle damage, cedar post supports, improper footings, temporary lally columns, etc.As to writing an offer, that's a sensible and common approach. 

If it's not termites and knob and tube wiring on this one, it's a bad sewer line and ancient furnace in the next one.

Investment Info:

Single-family residence buy & hold investment.

Purchase price: $62,000

Cash invested: $10,000

3 Bedroom ranch

What made you interested in investing in this type of deal?...

I did replace ALL the ancient dust coated hydronic baseboard heaters with new ones (got them 1/2 price).

@William MeroneThis day and age, checks of any kind are ancient and a waste.

I once had someone go through the roll-off and haul 3 dead water heaters out that had been in the basement, and an ancient dead central heating unit.

If ancient, maybe just roll with what was done and warn them for next time.

I have this image in my mind of ancient Rome and some dude knows a friend who needs to sell a feild fast...

I am building's owner and I will appreciate if someone has any advice about how can I find trusted real estate agencies or real estate investment companies which probably they will have interest in Athens, Greece.

I would rather see $150/door on a property with brand new mechanicals than $250/door on a property with ancient heating/electrical systems.