Have a Blast Toys & Games is also on eBay! We'd (shootin' straight with ya) prefer your purchase on our website to help us support charity and avoid fees. We, also, believe in options. Since we're new, you might prefer the guarantees provided by eBay. We want your business however you would like to give it to us. You can check out our 100% eBay feedback here.
Onto the blog topic, if you're thinking about procrastinating on your purchases we can give you a link that gives you cut-off dates for all three major carriers (USPS, UPS, FedEx).
eBay has some great inside baseball information about all those carrier shipping deadlines with each of their different services here.