Trying to sell designer swim trunks

Me and my gf were moving out of her house and we found a pair of LV swim trunks and Dolce & Gabbana swim trunks both with tags and in good condition. We are trying to sell them but we are not sure on where to sell them and for how much so any tips would be appreciated. Links provided below bcs i don’t know how to put pics

https://savonches.com/products/louis-vuitton-blue-monogram-bandana-swimshorts-2

https://symbol.fashion/dk/store/carretto-print-swim-shorts-dolcegabbana-m4e66tfhms9-colorful