When I googled about skin resistance I find people mentioning values as low as 500ohm but usually around 10-100kohm. When i measured the resistance of my own skin by putting the probes on the inner side of my forearm(just below the wrist) with 1-2cm between the probes, the resistance is so high my multimeter can't even measure it. I tried wetting my arm with some saliva and got a resistance above 1000kohms, and yes, I mean 1 million ohms. So to assure that I didn't misinterpret the numbers on the multimeter, I measured a 100kohm resistor on the same setting and it showed me "100" and then my skin again and it showed me about "1487". Is this possible?
Yes, it is possible. Now try measuring your skin resistance with a larger area contact. Also bear in mind that when it comes to mains (high voltage) electrical shock the skin is not just a simple passive resistor. It can break down, and when that happens you are looking at the resistance of the blood stream and fat/muscle tissue which is considerably less.
Yes, it's possible. There is no such single universial thing as true value of skin resistance.
Real skin resistance depends on a lot of factors, including how sweaty the skin is, how calloused, how clean, etc.