Gammayo ... if there is anything I’ve learned in my 30 plus years of marriage .. It is one person is “ALWAYS” right and the other one is ALWAYS the husband
Here’s a quick and easy trick to sell the deal .. never tell her how much you paid .. instead tell her how much you SAVED
Women key in on discounts and savings .. not price
Example .. honey look I just picked these speakers up for 12K .. her response will be “That’s a lota money”
Put some spin on it .. with a set of speakers say listing for $20K and you paid $12K .. you say look honey I just saved $8K on these speakers .. she will say “That’s a lota money .. good job” or give her the percentage off and she’ll be just as impressed .. Look honey I just save 40% on these beautiful speakers .. she will easily relate to that better than telling her what you flat out paid
If that doesn’t work .. jewelry always does .. I just bought my wife a Mood ring off Ebay .. it works great .. when she is in a good Mood it glows Emerald Green and when she is in a bad Mood it leaves a RED mark in the middle of my forehead

DISCLOSURE .. still listening to my five VR4.5’s in my HT room from the Bronze Age when Albert was still creating in NY State