Walmart has a whole bunch of manga preorders heavily discounted (most 47-48% off) with free shipping! No minimum purchase required! You order several items at once, and they will all ship individually. Walmart accepts cash (pay in store within 48 hours), PayPal, and credit/debit cards. I believe this covers most of the heavily discounted preorders. Note that some are due to be released real soon, so get your order in now before the free shipping disappears or the price goes up! UPDATE: Since my original post, Walmart has lowered the price on some of these titles and raised the price on others. The bad deals have been removed, and new ones were added. Some of the titles that have been released since then are at the same price or lower, but they are no longer eligible for free shipping. Those titles are eligible for free shipping on $35+.