What percent of equity should a wholesaler be looking for?

[Kyle Grimm]

I am in the process of buying a list from listsource for absentee-owned properties.  My question is, what percent of equity have you wholesalers found works the best?  I have heard I should set my dates that the mortgage was started from as far back as I can until about 10 years ago.  So at least I will know they have been paying on their mortgage for 10 years.  I would love whatever feedback I can get from you pros! Thanks in advance.