Zencart redesign support for SERIAL NUMBERSs

I have a very unique requirement of selling certain numbers along with the other normal shipping cart items.

I seek your help on how to do this.

The products are some pre-generated serial numbers.
One serial number is sold once only, and it is never used again.
Some customers may buy a rage of serial numbers to keep them in their stores. A serial number has at least $20 value.

So, I have planned to choose the ecommerce feature from zencart, and manage the cards differently via new admin.

Any suggestions please?