Length of time a seller defaulted payments affect sale?

[Jose Falconett]

So if a seller has defaulted payments on their taxes or mortgage for several months, does the length of time that they have been in default affect a prospective buyers ability to purchase the house even if the buyer is willing to pay off those defaulted payments (motivated seller).

I would rather not wait to find out the house is not sellable at closing/title search due to tax or foreclosure proceedings. I would like to be able to know before putting it under contract.