Will you be bringing any Artist Editions with you to the Baltimore Comic-Con?
It looks like there are about 93 Artist Editions left -- so if you hop to it, you should be able to snag a remaining copy pretty easy.
Aaaaand, if you're just starting your Sheldon collection, there's even a reduced-price bundle pack with all 5 books .
(Our one request: Please double-check your shipping address before completing your order! Lots of times, folks have moved since they last made a purchase, but they haven't updated their address with Paypal. Thanks!)