I have tried few VPNs, but I wasn't able to use SSL (web-sites using HTTPS) when using them.

To pretend that you have a USA IP address, you can use the following:

• VPN with USA IP address
  
  Hotspot Shield is a freeware VPN allowing to use https:// web-sites. However many online stores reject your credit/debit card or paypal transaction when you use Hotspot Shield.
  
• Proxy server with VPN with USA IP address
  
• The Onion Router (TOR) Anonymity Network with VPN with USA IP address
  
  The Onion Router (TOR) is a free software enabling users of its network to communicate anonymously on the Internet (TOR claims anonymity because TOR does not, and by design cannot, encrypt the traffic between an exit node and the target server, any exit node is in a position to capture any traffic passing through it which does not use end-to-end encryption, e.g. SSL. So don't mistake TOR's anonymity for security). Please also note that someone can use you an exit node to attack computers, distribute children's porn, send spam and many illegal activities, and so police can come to your door to ask about it!
  
  To get a USA IP address with TOR, user need to force the last node to be in the USA:
  
  Click Start -> All Programs -> TOR to open torrc file.
  Append the following two lines to the the bottom of the file:
  
  Code:

  StrictExitNodes 1
  ExitNodes {us}

  This will allow dynamically configure a USA-based IP as exit node. TOR will automatically choose a suitable exit node from the
  chosen country.
  
  Instead of the country you may also show the node names explicitly. The problem is that nodes become removed or inactive. Furthermore other nodes can still be alive but other nodes have a better bandwidth and throughput.