The modules available are in the Free Software Add Ons link, above left.

I do not recall seeing one for this but there may be something that can be adapted/extended for this....maybe just a price sensitive coupon for the gift

Your page would not load - - taking too long - - when I tried to access

You might enable the display for load time
admin > config > logging > display page parse time > true

The online shopper will not usually wait around for a page to load and you could be losing potential customers