I agree with what everyone said about your models being legend (and even moreso amongst those few who only practice the art of boolean), but looking at what dharma just said - you're going to have use the latest version of Bryce to convert to .obj if you really want access to the real market for that type of thing. (Only Brycers can use .obp, but everyone can use .obj.) If you succeed in exporting it to the more common format, "build it and they will come." (Also note that there is less competition in the near-contemporary and plausible spaceships vs. all-out sci-fi/fantasy stuff, so you're not venturing too far into price-war territory. So I'd say to go for it!)

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Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.