I do not understand why people get upset over this stuff. First of all, there are scammers in every hobby or business . Secondly, a machine of any title could greatly vary in price based on condition alone. A players condition example of High Speed could sell for 500 if it is not working, has a lot of wear on it, is missing parts, has acid or water damage, etc. Another example of the machine could be worth $3000 because it has just been shopped and upgraded with LED lights (which the buyer is looking for), and it is in extremely nice condition with no wear at all. Another example could be brand new and in the sealed original box. This obviously would be extremely rare, however it does happen. This example could sell for $7500, because there is a collector out there that favors the machine, and views this as a once in a lifetime opportunity to have a brand new High Speed machine(which turns out to be his/hers favorite game). A real shop job and rubber/LED replacement could cost up to $1500 to have done by a professional. That amount of money has different value to a person depending on many factors. Also, someone may be on the fence regarding if they actually want to sell the machine, so they make the price higher in order to justify getting rid of the game. There is no right or wrong, and stating that a specific title is worth a set amount without giving any value to the condition, when it was shopped, how many mods it has, how rare it is, etc makes absolutely no sense.
Unfortunately, most of the people complaining about what people sell their games for are the people that turn around and do the same thing themselves. Most of the time, they can do their own repairs, and place very little value on the time that it takes to properly shop a machine since they have all of the time in the world to shop the machine themselves . These are the people that low ball you when you are selling a game, and then turn around and attempt to sell their games at full retail each and every time they sell a machine.
Of coarse there are extreme situations that make zero sense, and their are times in which the seller is clearly trying to take advantage of a buyers lack of knowledge or experience in buying or selling pinball machines .
If you do not like the price of something, then just don't buy it, and just stop bitching about it ...