Many high quality prints including limited editions are available in the shop section of this site, but some prints have been released exclusively through outside vendors including Derbby. Each print is generally larger and is printed on Epson Hot Press Bright White Paper (330 g/m²) using pigment based archival inks and includes a certificate of authenticity. They retail for $149 but during the week of the prints initial release you have an opportunity to purchase these at a much greater discount, starting at $25 depending on how early you jump on the sale. To find out about these special releases, sign up to the mailing list here or at the bottom of this page.
If you're interested in prints of '186,000 Miles A Second', 'Coming Of The Silent Wave', 'Starship Trooper Redux' or 'Superposition' they're all available through Derbby right here.