How to compile legacy VB6 code

I think your eBay regional site - eBay.com for USA - would be your best bet.

However, before buying make sure that your are buyng legal software. Please check the link below: ebay guidelines on buying software and please make some research regarding relevant copyright laws in your country.

VB6 is still available as a part of the MSDN subscription.

Looks like you can get VB6 now, but only by buying Visual Studio 2005 / 2008 and "downgrading". Source.