there is no answer Marco.
my internet&games machine that i'm typing on now doesn't have access installed. i have been browsing the last couple of weeks for the access add-on to the installed office-XP-standard.
here's what i found:
local discount store - a2k2 Frs 790.00
local discount store - office-XP-pro (includes a2k2) Frs 590.00
www.dell.ch - office-XP-pro (includes a2k2) Frs 825.00
www.dell.ch - office-XP-standard (without a2k2) Frs 685.71
conclusions:
-adding word/excel/powerpoint to access
subtracts value
-adding access to word/excel/powerpoint
adds value
the only answer to your question is to benchmark yourself against the competition: find everything that is similar to your application, compare feature by feature, and price where you are competitive feature/$
...then the real test: try it with a potential customer.
izy