Should be sliding scale. Our average price point is about $30,000 and what you built could work for us, but at 18% we'll just build it internally.
RE: SquareBit Site
Not clear what this product does. Screenshots off UI should be foremost with brief explanation of what this does.
RE: App UI
You've got what looks like an MVP flow shown here. If there's more depth to this product I'd want to know about it. For example, how am I handling payments? What if I want payments outside of credit cards? How much of git internals are exposed to users?
RE: Inventory vs. Marketplace
You're demonstrating an inventory application here, not a marketplace. That's good b/c there is a shortage of good inventory applications for small business, and its a niche that needs to be filled.