My parents are having their 50th anniversary next month. I am hosting the party at my house (~40ish guests). They have an old as dirt 42" (1st generation) LCD TV that they have been wanting to replace for some time. I found a sweet curved 55" 4k 3D Samsung 9000 series on sale for $1199 shipped. I figure 3x $400 and it is paid for (2 sisters and myself). Me and my older sister are cool with it. My younger sister is cheap as can be and wants to "give them money towards" a tv or some other cheap backout plan. Between her and her husband they make $350k a year so they are not hurting for anything (her husband is totally cool with it). She can't believe we are getting something "so expensive" for them.
Am I being unreasonable here?
Am I being unreasonable here?