For example t must have hand rails, and no peeling paint, no holes in the walls, but aside from that, I rarely ever see properties get denied because of condition.

CUTE and in good shape 3 BR Cape Cod (aka bungalow to Detroit folk)  I want to paint it a lovely colonial blue with white trim.

Maybe you see other properties advertised for $700 but they probably have newer carpet, paint and appliances.

You paint this as the agent being the problem... the agent works for your buyer (no different than you working for your buyer no matter if they round the sales price or not).

There is led paint that has to be removed and the entire plumbing will have to be replaced. 

@Mark Maly mostly cosmetic (paint, carpet, new shower, replacing appliances). 

Is it easy to verify if lead paint was used in a house before purchasing it?

Those doors and trim that look good enough to keep when you first walk through a property in bad shape will look pretty rough once everything else around them is new and/or freshly painted.  

But the property will need a 10.000$ investment in second hand furniture paint job to be ready for sell or rent. let`s say i`m flipping for 60-70.000$ how much am i gettting for ROI Wise about 20%.And can i make that sale in 2 months because other properties are selling for the same price and my property has a new paint job?

I spent 30k to fix it up including a new roof, painting over strong smoke smell, and converted an office so it was a 5 br and slept in the new bedroom and rented out the other 4 to young professional women like myself.