Very unlikely... you're describing an acquisition cost of $2.50/member, to produce $0.50/member of revenue (if the 'five digits' is $99,999). A different take on it would be that $500k investment to support revenue <$100k a year later isn't a formula for success either.

Marketplaces are a difficult pitch, since you need to convince the investors that both the buyers AND the sellers will value your proposition (and can be acquired at a cost low enough to be profitable).

I know this isn't what you'll want to hear, but if you're in a "pre-revenue" or "only enough money for ramen noodles" kind of situation, most Angel Investors would want to see you have >1,000,000 registered users *before* they get involved.

I don't mean to "shoot ya down", just saying, it's a rough marketplace. I'd be happy to discuss ways to dress up your plan, in a private consult if you like.