Now before any one howls me down for this,i know its not on form and wont happen all the time, i had a look at their prevoius prices at their last meeting on the ground their playing and this weekend and:

last meeting: this week:
collingwood $1.60 ****$4.75]won
carlton $3.00 [$4.75] won
kangaroos $1.38 [$3.60] won
w/bulldogs $1.47 [ $2.00] lost
w/coast $3.20 [$5.10] won
richmond $2.20 [$5.10] lost
port adel $1.05 [$1.60] won

A pretty good weekend, pity a didnt have any thing on them, next week could be a shocker though,might have a look next week and see what happens.