Many thanks for the reply,

After much deliberation, it seems the promotions tab also doesn't accomplish what I looking for as the price is fixed for the duration of the promotion rather than increase/decrease after 1 unit is sold, same with the specials section.

I wonder whether the options section could work but with some programming. As this section has the price modifier and tracks stock and there is a hidden field so in essence the customer would not have to select any option on the product page and the price of the product would adjust itself upon each sale of 1 unit.

At the moment, the only work-around is to have each product only have 1 unit of stock so when someone purchases the 1 unit I will have to manually enter the increased price point and stock level to back up to 1 unit on the product page.

Maybe one of the admin's could respond?

Again, thanks in advance for any help.