What                             +item%   dur.   cost    cost/(1%item*turn)
-----------------------------    ------   ----  -----    ------------------
knob goblin eyedrops                15      10    200        1.33 *
love song of disturbing obsession   20       5    600        6.00 ~
! potion (object detection)          5      10    325        6.50 !
scratch'n'sniff unicorn sticker     25      20   3400        6.80
blue-frosted astral cupcake         30      20   4100        6.83
lavender candy heart                10      10   1400       14.00
blue snowcone                       30      20   9000       15.00
eyedrops of the ocelot              10      10   1970       19.70 +
cyclops eyedrops                   100      10  25000       25.00
eyedrops of the ermine               5      10   1580       31.60 +
pressurized pot. of perception      50      10  35000       70.00 +

* Also decreases meat drops and stat gains.
~ +20% only when there are 20 or more turns of the effect remaining.
! Price depends on which bang potion you need this ascension.
+ Potion duration varies from 5 to 15 turns depending on class and skills.

Mall prices as of 2009-11-07.