Gymshark Onyx V5 Seamless T-Shirt Carmine Red/Black XS Extra Small

Purchased new, paid $400 resale from a seller in the UK since this colour and size was impossible to find in Canada/US. Super rare. Can show proof of what I paid for the shirt + shipping. Just trying to get back some of my money, will not sell for anything lower than $300 (will just gift it to a family member or friend before selling for less than that). NOTE: when I was trying on the shirt for the first time, it was too small and a very small thread came loose in the left armpit. I took it to a tailor and had the loose thread professionally repaired (it is not noticeable at all, see photo).