Unless you have a very specific market that "requires" high end appliances, there's no reason to buy them for someone else. In fact, if the kitchen in general is builder's grade or over ten years old, there's really no reason to buy new appliances at all if they work fine, unless they're scratched, chipped, faded or stained. Instead, give them a good scrub inside and out, or get in a service, and keep them pristine throughout the showings. Unless there are a lot of highly comparable houses in your location which have older kitchens with newer appliances, you'll be fine. You can go easier in the negotiations if you haven't just plunked down $12K on new appliances, and you can offer to replace them before closing so that the new owners can move in turnkey if that's what they prefer.

Certain markets demand SubZero, to the point where it's part of the MLS description. Equally, and impressive looking range can pique interest. If you're not in that category, but have a lot of competition, new mid-range appliances can be attractive.

The most important thing for the kitchen is to be spotlessly clean, including the corners, above the cabinets, etc., and totally de-junkified. Even if the "junk" is today's mail or a single kid's backpack, hide 'em. Smell is important. No "hospital" smell of disinfectant, Lysol, Pinesol, etc. No pets or pet smells. If you can't remove your pets from the house, at least get them out of the kitchen. No chemical cooking smells. If you want it to smell like cookies, bake cookies and offer them, but some people find that cloying. Additionally, not being able to smell any food at all conveys a sense of "newness". That you'll have to judge for yourself. Fresh and airy is always good.

ok, I understand, but lest say that it would be nice to have nice appliances in the kitchen before we leave 3-5 years.

What are you looking to replace?

Are you looking at a range or cooktop and ovens? Gas or electric? Are you willing to switch if you currently have gas and need to upgrade your electrical service to get induction?

If you are working with existing cabinets, what space do you have for a refrigerator? Do you want ice? Ice through the door? Water through the door?

Do these have to be stainless? White? Black? Paneled where possible?

Do you have an overall budget?

More information is necessary before anyone can give you helpful suggestions.

Depends on where you live. We have lots of $1M + homes. It's detrimental to not go high end on a home like that, because that buyer expects it. If you are like the rest of us, you can get nice looking mid range models that will check all the boxes you could ever ask for and set you back a lot less money.

Range top gas, dishwasher, and going from a single to a double wall oven

I suggest a Bosch dishwasher. I chose it based on research here and am very, very happy.

I think it is almost impossible to give advise on this. In our mid range neighbourhood it really doesn't matter what is in the kitchen because whoever buys will throw out the existing and put in what they want. The house down the street from me has dumped the entire kitchen including sub zero fridge, and I don't remember what else. The house next door did all kinds of the usual prep to sell and the new owners tore the house down (which I might add horrified the neighbourhood as this has never been done before or since). Your neighbourhood may be different.

You could get much more help here if you were to go to a few appliance stores, see what you liked and thought might work, and then ask about those specific pieces here.