$100 for a proto on someone like Jango is a bit low balled to be quite honest. Usually characters like Vader, R2, Boba, Jango... fetch at least some change over $100... Don't get me wrong they can be snagged cheaper but those deals are usually far and few...
Of course making friends is a good thing... I have paid as low as $25 for some protos and even had a couple given to me... Networking is the best advice for anyone...
Scott... Focusing is much easier on the wallet and less stressful... though depending on who or what you choose to focus on. I have a Hoth proto focus and have a bunch of protos focused on Hoth characters...
Snowtrooper deluxe, Hoth soldier (old), Luke Hoth, Luke from TaunTaun... and more...
It's cool and much easier to concentrate on then just going nuts and buying up all the protos I want. I do have protos of other things though (even some unreleased stuff) but I don't go too crazy. It's all in fun...