I hear you, but the asking price on entry level around here starts around $275K, so we may be talking about getting that price closer to $250K list, without the additions. That becomes a whole different ballgame.
Hmm, let's say we are dealing with an end user (owner occ) with good credit and goes for a 30 year fixed rate mortgage. For simplification, we will use your two numbers and not deduct any down payments.
275k @ 6.5% = $1738.19 principal and interest.
250k @ 6.5% = $1580.17
Your actual mileage may vary based on credit score, down payment, taxes, insurance and so on and so forth, but my point here is that 25k in the selling price financed with a typical long term fixed rate is not that big a difference ($148 a month). Some of these other factors might affect one's ability to buy the house , but if that amount on the sales price is the difference between being able to afford the house or not, these buyers are in too high a price range already , IMO.