Thanks for your great suggestions! A friend suggested that I say "Why, do you want to buy it from me?"

when someone asks me how much my bag/jewelry/shoes cost.
I've also been married 30 years and my in-laws are exasperating to say the least. I have had to put my foot down with them as you have. We don't see them as often as we did, so it's less of an issue now than it used to be.
My aunt once asked how much my handbag cost and I told her it was a gift (it was a gift from me, to me, so technically I was telling the truth). She then demanded, " Are you
refusing to tell me how much that bag cost?!" and I demurred again, insisting it was a gift. I blush very easily when I am stressed and I could feel my cheeks burning but I stood my ground. She obviously got the message because she didn't ask me how much my Cartier watch cost when she saw it for the first time
My sister is extremely jealous and has a very quick temper which erupts without provocation. I once asked her when her day off was and she went on a ten-minute tirade about how unfair it was that she has to work when her friends don't. I just never know what will set her off and it makes it extremely stressful to spend time with her.
Several years ago, she tossed one of my bags away from herself as if she had been bitten by a snake. She yelled, "I thought it was a Kate Spade but it's a VALENTINO!" and went on a rant about my life versus hers. She then proceeded to give my
Gucci pumps the hairy eyeball. That was the start of a (not) fun day together. She didn't speak to me for the next six months to punish me for my perceived sins and I have to admit it was a very peaceful six months lol
I've made some adjustments in what I wear; my Chanel bags are re-issues rather than classics and I have several
Loewe Puzzle bags because their small logo is not recognizable to my family. And, of course, I wear less jewelry.
I have also given my sister several bags, some newly purchased for her birthday and some gently used, but I never see her with them. I've come to the conclusion that she immediately sells them so I re-home them myself now and use the proceeds towards my own new bags. I actually think giving her the bags increased her resentment rather than resolved anything.
Suffice it to say that my family does
not put the fun in dysfunctional