I don't know if this is right place to post this or not. If you live within driving distance of Conway, NH there is a CB dealer that is having a sale on thermopex. The 1" is $11/foot and the 1 1/4" is $14/foot. They will cut it in 5/foot intervals. I hadn't heard of them until we started pricing the thermopex and I started calling dealers in our area to find a price for it. I don't know how long the sale is on for, only that it is a summer sale. They have both in stock. We only have about 33' to go underground so going the pex and foam in a ditch type of install didn't seem like it would be worth it for us. Also the 1 1/4" is I.D. This was great for us as we were planning on doing two runs of 1" to get enough flow out to our greenhouse, so with the 1 1/4" we only had to do one run.