In a previous article I talked about how important it is to stretch the psoas muscle. This can cause many complications including back pain. To recap, most people have tight and shortened psoas muscles. The common activity of sitting causes our psoas to be consistantly shortened for extended periods of time.
The sale on March 31 is a wash sale. The wash sale period for any sale at a loss consists of 61 days: the day of the sale, the 30 days before the sale and the 30 days after the sale. (These are calendar days, not trading days.
Sales can be scheduled up to 30 days in advance and eBay keeps sale information for up to 15 months after the end date. If you have bids on an auction-style listing, you can't add or remove a free shipping sale.