If the Metaverse is the visionary space that is poised to greatly expand human activity, building of interpersonal trust within the Metaverse must be possible. Trust has been described as a "lubricative" for business, innovation, resilience, and even general enjoyment. In its most basic dyadic form, peer-to-peer trading of virtual items with the means of shared augmented reality should be possible in a trustworthy manner. Here, we investigate how specific design choices to facilitate such a trade impact trust. A user study with 36 participants showed that the entailment of a mutual confirmation of an item exchange improves both trust towards the software system, as well as interpersonal trust. We further found that perceived closeness towards the trade peer remains a much greater influence on trust than any other effect. We also found strong correlations between user experience and trust. In summary, our research shows that shared augmented reality can provide a great environment for trade and bartering among physically co-located peers, because potentially defrauding behaviours can be impeded by explicitly displaying item ownership and safeguarding the transfer of ownership.