wholesaling property with backtaxes

[Bobby Masih]

have a property where seller wants 15k but owes 10k in backtaxes... instead of writing the option agreement for 25k (house is worth probably 20-25k), i offered him his full 15k to be conveyed as quit claim deed in hopes it would be more attractive to my buyers and they would assume the liability for the backtaxes and figure it out themselves. would an end buyer like this route more rather than pay full 25k for the taxes to be paid off at closing.  i been told that some investors know how to figure out the backtaxes/liens.  never done something like this anyone have any advice if this is the best way to do it.