"To purchase the CorelDRAW competitive upgrade to Illustrator CS3, you must own a registered copy of CorelDRAW. Only one competitive upgrade is allowed per customer.
Canadian residents please note: The CorelDRAW competitive upgrade to Illustrator CS3 is available only to residents of the United States."
US$199
It would be typical of these competitive upgrades that you have to provide the original serial number of the Corel Draw to Adobe to qualify.
Yes, but is ANY version of Corel Draw eligible for an crossgrade? Because *really* old versions of Illustrator are not eligible for an upgrade to CS3...
FRom the Adobe store (I believe this is still the only way you can get the competitive upgrade):
Adobe said:
To purchase the CorelDRAW competitive upgrade to Illustrator CS3, you must own a registered copy of CorelDRAW. Only one competitive upgrade is allowed per customer.
So, the important points are one per customer, and that it's registered. They don't care about the version.
It might be a good idea to use their phone ordering system if your CorelDRAW is really, really old and you want to be sure there aren't any misunderstandings.