I feel your pain. My standards used to be lower when looking for games to restore, but I soon realized that once I had finished them, that I had no real interest in playing them. So, I am now only looking for those games that I know I will want to keep once I have finished restoring them. The problem is, it isn't easy to find restoration candidates on my wish list. I am not interested in spending up to 1500 - 1800 for "original" games, or games that have already been restored by someone else.
But, it seems as if when I look at certain threads like, "show us your EM pinball machines", people are somehow finding these titles at reasonable prices. So, I guess there is hope. You gotta just keep looking I guess...