US Brompton owners: Recent experience with eBay seller startfitness-outlet (tariffs & carrier fees)?

I wanna buy this bag for my new Brompton bike from startfitness-outlet on eBay. Since they ship from the UK and all US imports are now subject to duties, I’m trying to calculate the true landed cost before clicking buy.

https://ebay.us/m/BhMoHH

​For those who have purchased from this specific seller recently: Which shipping carrier did they end up using for the US, and did you have to pay high brokerage/handling fees to the courier on delivery? Any insights would be super helpful. Thanks in advance!