Yeah...
From what a lot of people have said, it sounds like S9 is just about the way it should be. Keep the BBs reasonable and expand the selection a lil (.30s, .23s, more brands, ect.) and I'll buy from you whenever I'm in need.
Parts bin sounds cool until you figure out how cheap they would have to buy the guns to have a high enough profit margin to give up the floor space/fuck with it.
The consignment thing sounds awesome.
Maybe stock guns that run the price range from budget to high end.
Please stock Thunder Bs at a reasonable price.