Ask HN: Where can I sell B2B Leads?

I did some crawling of a site that has lots of businesses, and so I have a TON of B2B leads (most of which I will never use for myself).

So I was just curious about how I can monetize these lists.

I have them broken down by city & state in the US.

Are there recently made, credible, marketplaces that facilitate the sale of these types of lists?

I found a bunch of sites, but they all look a bit sketchy.

Suggestions? Anyone interested in buying B2B leads?