gallon bottles are cheapest there too...and the good thing about Amazon is you never have to worry about much especially quick delivery ...for free...not to diss any other sellers...I'm obviously just a huge fan of Amazon's services
I try not to use the stores withion Amazon but when I do that usually works out fine for instance I scored some Beneficial Nematodes for my girls and keeping the gnats down so I used an Amazon store (private seller) the package came and was in the mail for several days in 90++ deg heat andno ice pack in the package..I opened up the jar of nematodes and noticed a few live bugs in it from the packing inside so obviously the nematodes weren't alive so I contacted the seller and he was very nice..said to try it anyway and credited my acct instantly. Still was kinda pissed I didn't have the product I needed right away. I used fly paper strips which sufficed I guess. My plants are doing well and the qnats are minimal although still there...Probably better off buying that product in the colder months unless a seller is known to send em' packed in ice..over-all Amazon still worked out great.