Pumpkin patches. Colombian dwarfs with a dark abdominal pattern that genuinely does look like a jack-o-lantern face, sold as large and small forms that may or may not be the same species depending on who you ask.
Fast, hungry, heavy webbers, and small enough that a full adult female fits comfortably in a container most people would consider too small. That combination makes them one of the better options for keepers running out of shelf space.
Affordable and widely available, with the large form commanding a modest premium over the small purely on size. The unresolved taxonomy means locality labels here carry less information than buyers assume, and paying up for a specific Colombian locality name is usually paying for a label rather than a distinct animal.