Buyers, sellers, investors?

As a wholesaler, I know that in order to sell a property to a buyer I must determine the MAO (maximum allowance offer) for a house.

I came across this multifamily property near my area that has been recently sold and wanted to see for myself what the buyer saw in this property.

For example if i'm trying to build my buyers list and I call a RE agent to look into the MLS and find me recent cash sales on houses and provide me with that information, how does that benefit them?

Listing agent CAN disclose offers to buyers/agents, but need permission from the seller first..  

If a house seems to look like it's a tear down, would it be hard to find a buyer?

I know most people say leverage into more units before paying off a unit as to not tie up funds (safety through numbers etc), but I like the idea of paying off 1 in 3 units owned.For marketing, it seems there are plenty of ways to find cash buyers for deals.

I do things like replace furnaces or entire plumbing systems so that my buyers don't have big ticket repairs right away.

and now there is FIRTA which requires tax withholding on sales by non-residents/non-US citizens.Here's a list of popular countries, with restrictions:United States--- Purchases in some areas can require disclosure of principals and FIRTA withholding at sale time approximately 15%.United Kingdom--- 3% stamp duty on investment buyers and 15% tax if bought in name of shell company.Thailand--- Foreigners cannot buy freehold land....and only 49% (foreign quota) of certain condo projects. 

My plan to get involved in notes is to buy for cash a SFH, rehab and then sell on terms to an end buyer (instead of holding to rent).