Amazon have dropped the price of this 5ltr size Roundup pump and go to £18.99 with free delivery. some places charge that for half the size. I spotted it late last night so I decided to try it through Flubit and this morning received an offer from Flubit for £16.66, I nearly ordered it last night at £18.99 as I consider it a reasonable price now im so glad I took the chance and waited. Flubit dont always come back so quickly with cheaper prices and the price can rise on amazon while you are waiting. The cheapest seller on ebay is £23.55, wilko is £21, Homebase £28.99, B & Q £26.57.