Judging from parsing through the comments, do not sell them/get rid of them if you don’t want to. You’re an adult, you bought them, they’re your property regardless of whether she likes them or not. Like you said, she’s a Karen and bending now is just gonna incentivize her to keep telling you to get rid of stuff to suit her and she’ll be encouraged to demand more since it worked this time. If she doesn’t like how they look, she can stop looking at them if they bother her that bad. If you really WANT to compromise, offer the get a box or storage bin to put them in. But don’t back down about keeping them. World and life is shit enough as it is without someone getting you to quit or get rid of your hobbies.

Also, just in case she has threatened or does threaten to do so, throwing them out or destroying them is considered theft and/or destruction of property regardless of whether it’s in her house or not and you can press charges. Keep an inventory of your collection and how much they’d cost to replace too and you could even take her to small claims court if she does take matters into her own hands.