Many USA based package forwarders list their services on eBay USA.
Check out this eBay.com category :
Specialty Services > eBay Auction Services > Packing & Shipping
link:
http://services.shop.ebay.com/items/Packing-Shipping__W0QQQ5ftrksidZp3286Q2ec0Q2em282QQQ5fcatrefZ1QQ_flnZ1QQ_sacatZ50352