As for today Im using for my amazon.com shop with Amazon fullfilment center ( I think it's best solution for Amazon sales ) .
I would like to start using also fullfilment center for my eBay store and my WP shop .
eBay : Consider using Amazon or shipwire
Wordpress site : probably also one of those 2
Shipwire - I think I'll make it with eBay integration so they will also upload the tracking numbers
use direct integration with PP ( as I use only PP for my WP site as well ) , however Im not sure ShipWire add tracking numbers to PP integration and it will be auto transfred to eBay ...
As you can see I have some mess here
I would like to hear your opinions about it ...
1.I use only fullfilment because of my location
2.BTW : I also interested in shipping worldwide specially UK / AUS / Germany/ Brazil