I am using Ubercart 2 on Drupal 6 with http://drupal.org/project/uc_product_minmax. It works well, except for the fact that the default catalog only provides an 'Add to cart' button with no quantity field, and the quantity it adds is 1, which makes it useless as the minimum order quantity in this particular case is 2.
I have tried implementing
hook_add_to_cart() to forcefully change
$qty to 2 if it's lower only to find that I cannot manipulate it before uc_product_minmax implements the hook, so I'm in need of an alternative.
Maybe this isn't even fixable without modifying uc_product_minmax itself, but I'm up for trying any other ideas.