My question is: What formula can I use to show the sellers what the building is worth based on their current income?

Someone said ---- "You don't Find good deals --- you Make them (create them, use creative formulas to make them work, negotiate to the bottom base line price and use the proven second stage negotiations for absolute results).Most all sellers ask too much for their real estate - they know what they will accept but inflate the price they are asking - this is done for several reasons - 1. they are greedy and want to get more than the top dollars and are working on the greater fool theory 2. they honestly don't know the true market value of the property so they just use the PFA method of pricing (Plucked form the Air) 3.

I like to be frugal in my personal life and very aggressive in business life because I do that for safety and I think that is a winning formula for success .

Yes but the formula is all pretty much the same. 

Reserves should be a function of your projections specifically for your properties, not some formula or a percentage someone else is using. 

Is it some ridiculous mathematical formula you need to understand the most complex Fourier expansion equations?

AAJyuIEoSiNYgf4I received an excel document with some plain numbers (i.e. no formulas), and I'm trying to figure out if and how the original calculations are wrong.

What math/ formulas are involved in the process of analyzing a deal.

I have a formula that I've been looking at that vaguely estimates depending on square footage and what kind of rehab is needed, but I want to see if there is anything that is a bit more accurate.

@Alisa Noll The newbies always tend to focus on formulas and sites like AirDna.