Aperture 3 price difference.

hi
I am thinking of buying aperture 3 and I have noticed a big difference in price between different sellers (nearly €100). I am just wonder if the saying "you get what you pay for" would be true in this case. What would the difference be in
an Aperture 3 for €99 and one for €190. Both are for sale online and from reputable shops.
Cheers.

Be careful when purchasing and there is a large difference in price. It may be that one of the purchases is a "full" install (more expensive) and the other is an "upgrade" (less expensive). The upgrade assumes you have a previous eligible copy already installed. Or the less expensive purchase may be an older version.