Northern and First Tunnels are about the cheapest. We looked at others but could fully replace this one two and a bity times to match their price for one! Poly tunnels are not cheap, ours(35 x 15) was about 4 grand with all the ground works, bund and pallisade fencing, soil , raised beds inside etc etc. But it is invaluable when you consider the veg, herbs and fruit I can grow when next to the sea in Shetland!