add “Exhibit A” with Contingencies.Within 10 Days of execution, Seller shell provide Buyer with any document related to the property, which sell include but not limited to:1.Leases, amendments, modifications2.Current or future lease concessions3.Security deposits4.Current rent rolls5.Current rent arrears6.All maintenance, utility, management, service, and other contracts.7.Financial statements for the past three years and a year-to-date financial statement.8.A description of all capital expenditures performed in the last 3 years.

They should be able to open title and tell you a solution before you find another buyer. 

I also generally price the house slightly above the market price as seller financing buyers tend to care more about terms (monthly payments, interest rates, down payment) than the actual sales price.For interest rate, I would consider something a few points over the market interest rate for a residential mortgage. 

Also, it's a buyer's market in Philly right now.

Lots of brokers and buyers going after the same sellers.  

How would I find sellers or buyers for their apartments, houses, or condos?

Caused the buyer much higher carrying costs and months of delay in securing the rehab loan to finally finish the house.

I have a buyer which I pitched it to, and to my surprise loved the deal.

If I pick up a property for say 60% of appraised value and I put together a lease option to an end buyer for 100% of appraised value on a 3 year term, after a seasoning of 6-12 months from the bank, can I refinance the property for 70-80% of appraised value while it is under lease contract?

Motivated sellers and the buyers or tenant buyers on the backend.Next you need to decide your marketing and campaign strategy.