4.6 differential settelment on foundation

[Jerry Lundergard]

i got a sweet 2008 house that fits all criteria but has 4.6 differential settelment according to inspectors zip line reading. It was -3.2 in back left and + 1.2 back right. A engineer report is recomended for 550$ does that much diff setelment sound to you guys like 100% foundation work needs to get done? Exterior slab is clean but there is minor wall cracks inside and tile floor cracks. If seller  doesnt drop price would yall walk on the 4.6 diff setelment even if engineer said no work needed? Dint really want to spend 550$ on report if seller wont budge unless 4.6 is kinda normal in texas. Not sure how to proceed. Thanks