If your trying to sell something, take the time and effort to write up a good description and take some decent pics. People put up adverts like that and wonder why things don't sell.
Not sure which is better but don't buy a cheap ebay one. My mate bought one and said it was rubbish because there was too much play, he then bought a D1 spec ball bearing one and its much better.
You could just buy a starlet intercooler kit and just modify the hot side pipework to suit. If you jigged up the pipes how you want them, I'm sure mark would easy weld them up for you.
I've used Paisley Freight a few times and never had a problem. Their quite cheap and you can pay for extra insurance to cover your goods if your worried about them getting damaged in transit.