i think if you intend to leave, get the quotes...if i were going to look at buying your house, that's what i would do, which also potentially slows down the sales process..lack of info is likely to lead to lowballing..while slab and mudjacking are great options to fill voids..make sure you ask the right questions including if they can guarantee that it won't cause heaving in other areas of the deck..when i had my garage pad and section in front of garage done, both contractors i had give quotes told me it is an imperfect science and can potentially cause over correction of the pad (higher in an area for example) that being said, one was confident enough with his experience that he guaranteed he would take out and re-pour a pad section if it over corrected..the other would not. my results of the slab jacking were that it was much better..but not "perfect" in terms of the level of the pad. (in short, i wouldn't put a level on it and expect it was perfect) you can see it is not perfect, but given i had a 1 inch to 4 inch drop and basically it now goes from perfect to 1 inch out, i can live with it..but, it's a garage floor, not a pool deck if it were me and i was getting slabjacking done and selling the house, the amount "out" i indicated would be good enough for me..and i would have a copy of the slabjacking bill to prove the work had been done to fill the void to the best ability..beyond that, if not good enough for the new homeowner, i'd let them deal with it