I wish I had 50K to buy pins with! Why buy someone's collection when you can build your own collection? Go the the Marketplace and start a WTB thread with a list of titles you want. If NIB Sterns is your thing, then go that route. I'm not a huge fan of some of the new Sterns, and would be looking for 80s/90s titles, but there's a plethora of games for sale, and I'm sure someone will have what you want. It might not be from the same person, but you'll get titles you want at least, unless you don't really care and just want pinball?