I've only bought it once so far, so am not positive on the price, but it seemed like it was 6 bucks and change for the same size package you bought. Prices are usually pretty high at health food stores. Possibly someone who uses it more often than I do can give you a better idea on price.
Scott, thanks for the tip on liquid Splenda. I'll check it out here though my guts tell me I won't find it. Actually, I bought the Splenda for my mom who's a diabetic. But if the cheaper liquid version is available, I can use it for baking!