Want even more water treatment for your buck? Get Seachem Safe (powder version of Prime, if I recall correctly it just doesn't have the heavy metal detoxifying and slime coat producing abilities that the liquid Prime has).
I just use Safe now as I don't need those extra 2 effects and it even makes Prime seem costly (price to amount of gallons it treats).
If you just solely need a water conditioner to remove chlorine, you can get really cheap Sodium Thiosulfate (Kensfish has them). Note that it does not break down/remove chloramine, detoxify ammonia or any other effects like the others.