Seller asking for hard proof of funds to be on VIP Buyers list!

[Account Closed]

Brand new investor dealing with fix and flips and wholesaling if the property is not of interest to invest in. 

Responded to Craigslist ad on a house for further details such as address, availability, etc. The "seller" responded with a request for hard proof of funds to be included on their VIP Buyers list without answering any questions.

I understand they want to weed out the tire kickers..........

How would the more seasoned investors respond???