Taxes when property through wholesaler (Ohio)

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Hello, I have a couple questions reguarding selling a property through a wholesaler. Am I paying capital gains tax on the amount I receive from the wholesaler or the sale price recorded on the deed? I asked someone at the title company and they told me I may have to pay higher taxes because the deed only transfers once and I may pay taxes on what the wholesaler sells the property for. 

Also, the wholesaler is located in the UK, but they claim they have a local buyer lined up already. I am hesitant to move forward with the transaction because of this. Anything I should be aware of or look into? Thanks