As long as husband doesn't present with worried face symptoms, wife shouldn't notice any missing money.
Wife: "Oh honey, I see you got a new 8 foot TV, just curios how much that cost because you know, my friend <insert friend name> is looking for one. Also, why stop at 8? You should have just just bought one to cover the length of the house"
Scenario 1: Husband: "Oh it was a great deal! I got it for
only $69,999.99 with free shipping!!" Wife: Smoke rising from ears and nose and probably some other places "<insert your choice words>"
Scenario 2: Husband: "Oh it was a great deal! I got it for only $1000 with free shipping!" Wife: "Wow! that's amazing, let me go call my friend" Husband proceeds to slip out of the house looks on DDF for the latest deal on a long term air bnb