Hey guys! I'm new here

So a few years back a naigbour was moving out and gaving me a 73 model B. I didn't think anything over and let it sit around. Well a just recently fixed a pachislo machine for my in laws and I got home with a wild hair up my butt that I should do something with my pachinko.

Well now I'm almost finished doing a full restoration on my original machine. Full tare down and everything. And I want more.

I know the machines available online are over priced. Amd I'm not too keen on shipping one for the price and damage concerns. I know for an un restored machine I'm looking for 50 or less en less it's a power flash. My question is how do I go about finding them and how am I supposed to talk down these insane prices for a trash heap of a machine. Everyone thinks their beat up rust bucket is worth 200 or more and I don't know how to tell them I'll give them 20 for it without offending them. I'm located in salem Oregon btw

Tl;dr
Where do yall go looking for these machines?
And how do you break the ice on price?