When I compare prices to Amazon I also add the shipping cost if that is the only thing I plan to buy -- sometimes the shipping cost is as much or more than the item. On MSQ the flat rate is $5 if less that $100 is purchased, so if all you bought was That Purple Thang, you would spend $8.50 for the item if you count shipping. Let the buyer beware.
Shipping costs are also a joke. I just paid $6.50 for 1 yd of fabric I ordered from a place on ebay -- the postage on the envelop was $1.20 and it arrived in the same time frame as priority would, but the seller got some bonus money.