How can I confirm a wholesaler is legit?

[Yer Xiong]

I have been looking for a good deal for quite some time now and have been talking to a wholesaler in KC, Missouri area. Problem is I saw the original deal from Criagslist and the poster claims to be a wholesaler from the area. The wholesaler also claims to have many deals and had emailed me pictures and info about the property, but no addresses provided. I did mention to the wholesaler that I will be an out of state buyer. 

How can I vet the person to confirm they are legit and not a scammer? 

Thanks all!