Ask HN: how to sell an early stage startup?

I'm part of a startup that hasn't got the founders' interest anymore, so we're looking to sell off the company with all of its technology assets.

The assets include the source code (obviously) for both the web API and site as well as additional user software created for the desktop. Of course, the existing userbase is included.

What are some methods used to sell small enterprises such as this? What caveats are there to consider? I know that this topic has been raised before but the answers have mostly covered website-only sales (without software).

Are there brokerages as well as online 'auction' sites?

Thanks in advance.