Blech, I'm not a social butterfly at all, but what about just "being busy" whenever she calls.
No need to declare war but more of a "Oh I'm sorry, but we just can't do that right now..we're busy."
and just don't respond to any of their requests anymore... maybe if there is a house a fire /emergency or something like that then it would be good to check on
she'll get the hint sooner or later.

I completely agree with Jo*mar. You don't to have a make a big declaration about it or anything, just politely say NO the next time you're asked. You can say you're busy ....or you don't have to provide any excuse or explanation at all ...and you don't have to pick up the phone, either.

There's nothing about your personal relationship with these people that will really help sell your house. The potential buyers will be interested in buying your home, not your friends. And they're not really friends anyway - they're they're just a couple of neighbors who've found an easy-cheap way to get work done around their house at someone else's expense.

they'll keep on taking so long as you keep on giving.

I say "We are busy, sorry" and DH says "we can fit it in, dont worry." so its as much a DH problem as it is a neighbor problem. he is now doing 99.9% of all of the errands, and quick trips they put on the schedule, but it really irks me that this woman treats us like chattle.

If you have your phone set to a special ring for her just ignore it. If DH wants to answer it and do what she asks then let him.

I've found that people like her.....arrogant, look-at-me type people are very insecure and need the approval of others all the time. They act all high and mighty but in reality they're scared of not being accepted. They think they have to show off....be bigger than life, better than you, etc. It's their problem. You choose to react to it. And that's what they want (and need).

Make yourself unavailable to her.....always. You can set your phone to not accept that particular number and they will get a message that says you're busy. Eventually they'll get the message unless they're really that thick and then you'll just have to not answer at all. I'm assuming your phone service has this. If not, just don't answer or turn the ringer off and instruct those you want to hear from what you're doing so they can leave a message or call your cell.

It's inconvenient and really unnecessary that you should have to "hide" in your own home. But.......it doesn't sound like she's going to change her ways so you'll just have to adjust yours.

It would drive me up a wall, too, but if you know you're moving at some point in the future just know it's a temporary aggravation. Good luck!