No problem.
--- Update ---
Since the past few days, I have been looking deeply into the codes as, I'm sure we're all proud to see that - since yesterday - customization of buttons from details page can now be applied without any risks involved).
In the mean time, I have looked at some examples from this MOD :
http://www.4homepages.de/forum/index.php?topic=8682.0and I think it is wise to say that, since it could really match with this particular Beta Shop MOD, it would be recommended to install it in order to facilitate the task for each users. This way, the beta Shop MOD could be customized in a much better way and the additional codings structure would be easier to handle than right now, since the category listings would be listed with the subcategories in the presentation on one single page. In the mean time, price fields could be indicated on each of these categories - as :
retail prices & packages. Althought, there's no promising on this one since I'm not completely familiar with this type of functions yet.
As for the details page, additional price fields could be created below the already existing price field.
As for the dropdown list, it would still be considered a hard task in order to accomplish something like this since each products info would need to be added into the products table and needs to be assigned from includes/functions.php file as a general function (pretty much like the buttons customization MOD).
However, even if my time is limited, I'd still acquire a tester user that has a great server dealership which can provide a great level of bandwidth usage due to a undetermined timing of testings of this project. Notifications will be sent to the evaluator once these additions would be greatly expand.
During this time, your patience is being asked as these try-outs will not be at a full-time basis.