Poshmark Shirt Purchase & Forwarding

I have found a specific shirt on Poshmark that I absolutely want, but because I live in Germany the platform blocks me from both buying it and arranging shipment, since they only operate in the USA. I already have the exact product link and the seller still has the item in stock... (Budget: €8 - €30 EUR, Jobs: Customer Service, Customer Support, International Shipping, Inventory Management, Logistics, Order Processing, Payment Processing, Product Sourcing, Shipping)