Quoted from Don44:You should be open to what is available in your price range, it can take a lot of time if you just set your sights on one pin. Almost everything in the top 100, even 200 are good fun pins and many come up in your price range
This is some of the best advice you can get ever.
I got nearly my entire collection by not using any wanted ads, only ever made one I think. Keep a big wishlist (open mind) in your head and jump on games when the prices are right or better. They come cheaper if you're not prying them out of somebody's collection too. When people are ready to sell the prices will be a lot cheaper.