I have had the house for 5 years-no problems that I have noticed due to the foundation.
I hope it can stay that way.
Just to put your situation in perspective, and because your "crack" reminded me of a property I now remember fondly, I thought I'd tell you about a Listing I once took for a small house that had a crack on the south side of the basement, the side facing the sun.
It was only a modest little $35,000 1950s ranch on 2 acres with a brook and a nice mountain view; but there was something strange about that foundation.
In the fall of the year I put an angle finder on the vertical wall of the basement, and found that it had somehow changed from what was presumedly 90° when it was built to what was then only about 84°.
As the house sat vacant, and without heat that Winter, I watched as the sun warmed the soil in front of the house during the days, and then the frosts would come at night to re-freeze and expand the ground outside . . . . alternatively freezing and thawing the soil and slowly pushing that foundation wall in and to the north. Frost is powerful.
By the time Spring came, that wall was then leaning inboard at an angle of 78° and it started to worry me that some of my Buyers might one day be crushed under that wall . . . . or under the house if the foundation slipped out from under the sills.
In the end, the Buyers had to get a back hoe to excavate the front yard and remove all of the soil built up on the outside of that wall; jack the house a few inches to get work space; get a bulldozer to carefully pull the wall back into a vertical position; pour concrete buttresses on the inside of the basement; and install French drain tiles around the outside to quickly draw away most of the water that tended to collect around that foundation.
All's well and good now. Many Buyers were frightened away from that house because "it was moving" . . . . but another wanted that lot and that view and he dealt with the issue. It only took one Buyer . . . . and he was able to deal with it. Someone requiring a mortgage maybe would have been prevented from making that purchase decision.
Hopefully, your "issue" isn't anywhere near that severe and the corrective measures already taken by past Owners had the effect of stabilizing the foundation in it's present position and condition. You're not hiding anything. Emphasize the reasons for buying it, not the reasons to pass it by.