Can I Get 80% LTV on my APPRAISAL at purchase?

[Blake Choisnet]

Does anyone know of a lender or product that provides 80% LTV on appraisal at purchase?

ex: Property worth $100k, have it under contract for $80k. Come to close and only pay closing costs.

I consistently find great below-market properties but would like to keep as much cash in my pocket for other property acquisitions. I'd like to identify a couple of lenders that lend specifically on appraised value rather than 'the lesser of purchase price or appraised value'. 

Any help?