Cash vs Finance TK companies

[Alex Corral]

Hey Guys, in my continuous research I've seen some companies are cash only & some offer financing. 

Should there be a difference in sales price between the two?

Should you be able to negotiate the asking price on either? And more specifically, the cash sales? 

I know you can later delay-finance a cash property, but it ties your cash for some time, where I feel you could lose out on a potential good deal(s). The other thing is the uncertainty of under-appraising. What if a month later, you find out you over-paid on that property? In that aspect, I feel the companies who offer financing would be more honest about their propertie's values with contingencies to protect the investor, correct? 

I assume it's cheaper overall to buy with finance vs delay-finance later? 

Sorry for all these questions on 1 post, didn't want to start multiple.