Which item is NOT listed for purchase at SEAMART?

SEAMART is designed to provide essential supplies for Navy personnel, and the items typically offered include basic office supplies and common household items. Notebooks, as indicated in the choices, are generally considered office supplies and are commonly available for purchase at various supply stores.

Toilet paper, copy paper, and pens are all items frequently found in such supply locations as they are used regularly by service members for personal hygiene, documentation, and communication purposes. While notebooks serve a similar function as copy paper or pens, they may not be included in the standard offerings from SEAMART, which could explain why they are not listed among the purchasable items. Thus, notebooks being absent aligns with what is typically not available at this specific supply point, making it the correct choice for this question.