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Since you say you have every set from the first generation, and yet you mention you stopped after the Toa Metru, I'm guessing you mean that you have the Toa Mata, and maybe the Bohrok and Toa Nuva.
If you have them all in the canisters with manuals, you might get $50 for them. I don't think there's much demand for those sets since they were extremely popular and thus very common. Now if you had the Rahi, you'd be looking at getting a fair bit more dough.
In any case, in the future you would be better off posting questions like these in /biog/ like everyone else does.