I'm reluctant to ask this, as it may not pass the question requirements (not allowed to ask for suggestions?).

Our company operates in a niche which hires and sells equipment. Often there is a requirement to source new goods, which would then be hired or on-sold.

The industry (niche) as a whole does not really have anywhere specific online to go to find new goods. We thought about building a niche equivalent of eBay.

To build a clone of eBay, would a simple classifieds script be too simple? We would need the majority of features that eBay has.

Any suggestions for a web app to act as an equivalent of eBay?