Which 3 rooms? Doubtful investing in a half done job will yield a return. I’d save the money. New buyers will likely redo it anyway and be unwilling to pay extra for a patchwork quilt.

I would definitely ask a local realtor if concrete flooring is desirable in your market and if it's best to ignore, replace (or in your case, partially replace) or offer a flooring allowance.

Price the house accordingly and be well aware that this is going to make the price take a substantial hit.

Doing three rooms would never get you full price but I am wondering if you have checked to see how much it would cost to have them resurfaced? I am planning on turning a walled in patio into a sunroom in a couple of years for my plants. One of the things I have looked at since that portion of the house is on a slab is having in floor heating with the concrete stuff glazed and finished vs. tile. I was told glazing would need to be redone.

Not sure if you're planning to work with a Realtor- I would. I'd find one that can sell benefits, over features. I get that the finish has gone wonky. It happens OFTEN, with painted/stained concrete. That's a feature, that isn't super-pretty.

But the benefit is that it's a flat sub-floor, ready to take on anything "new" a buyer can imagine. So much better/easier to deal with than a house on the block that has older carpeting, or tile that isn't appealing, or whatever.

Will it hurt your bottom line? Not with a good Realtor, with deep contacts in your area who can sell benefits. Find her/him, and save your $$.

Leave it alone....or have it ground/polished for the open house/viewings. The problem with doing only 3 rooms is the FLOOR HEIGHT difference. Any floor you put in (including sheet vinyl) will have a "lip" or a height variance where it meets the concrete slab. Tripping hazard = bad vibes for home buyers.

If you can't afford to install new flooring throughout (and carpet is the fastest, cheapest, easiest floor to add) then don't do a darn thing. If you are REALLY nervous about how much the look of the floors are going to affect the purchase price, then go ahead and have them ground/polished and then leave them be. The amount of money you will pay will be a snick more than flooring for 3 rooms, but it will maintain the asking price (no need to discount).

A "nice" looking, yet raw, concrete floor is FAR more appealing than a nasty "finished" concrete floor. If you have enough money to install 3 rooms with "other" product, then you have enough money to grind down/polish the concrete. Maybe not enough to "finish" it with a sealer...but certainly enough to grind/polish.