I don't know if it was in deed cheaper than Alappuzha (we didn't go to Alappuzha to find out). We found out through word of mouth!

In aleppey it will cost you a minimum 100 USD for 8 hours

Oh wow... if I remember correctly it was around US $120 for two days, including food, drinks and a canoe tour

Thats a very very good deal you have got ! if it was me, mostly they will charge 250

Like I said you know, that is if my memorry serves me right, otherwise the next number that comes to mind is 170.

Keep in mind too, the off season had just started and it also was in 2013.