The Collector's Edition consists of a Bulgarian Barrel, a box with an autograph of the inventor Petyo Petkov, and a Bulgarian Barrel poster.
The poster's dimensions are 13"x17.5" (33cm x 44.5cm)
The price for the full Collector's set is $20. Shipping is $6 with USPS First Class Mail with Delivery Confirmation.

International shipping is available, and the cost is $13 with USPS First Class Mail. Unfortunately, no tracking or delivery confirmation at this price.

Here are four-color versions.