One means of research: talk to an experienced real estate agent that specializes in work with investors. 

Having a solid team around you like agent, lender, contractors etc.

If an agent brings a client and buys the wholesale deal, their standard contract is the second contract that the original contract is being assigned to.

That will require that wholesalers become licensed agents.

You could even post an ad on Craigslist or ask a real estate agent for leads.

Like every investment asset, real estate investing is not risk-free.And many more.....Answering these above questions will allow you to ask your potential real estate agents the right questions.Remember that the quality of your questions has a direct correlation to the quality of the answers you get. 

Also, what key questions should I be ready to answer when speaking with an agent?

Or I would have had to pester my agent for more information which takes time and that’s how you lose deals.

I would think about having a local broker/agent give you a BPO on it and see what the number comes back in at..Think this might be where Chris was going, but depending on your area and what sales look like in the end of the year months, usually sales are a lot slower, that might be a driving factor.

I'm also a real estate agent, have been a landlord, leasing agent, and property manager.