How to adjust up or down based on location?

[Christopher Kinnaman]

I recently posted a question on here about becoming a wholesaler a couple days ago. one thing I have noticed is that a lot if not all people that are selling a wholesaling course incorporate software where you input a few key features of the home and then it generates a value that you should then present to the seller. It doesn't take into consideration what type of street it is located on. If I used that same type of software, how then should I take that number and adjust it up or down based on location?

I want to make sure that the numbers work well before I approach an investor to flip the property to or assign the contract.