I placed an order with Ted Pella the other day. They don't calculate shipping at checkout, they invoice you at the time of shipping. I didn't think much about it...until the invoice arrived. $15 shipping to a US address (Residential Ground) on a $20 purchase. Needless to say, I was not pleased. Chalk that up to lesson learned. I guess they tend to cater more to commercial clientele who are ordering in bulk, but still...dang.