"Where can I get some tat? I'd like to trade it in"

In this quote, the speaker, Aaron Allston, is revealing a desire to acquire some "tat," which is likely a slang term for a little, economical product or trinket. The use of the word "get" suggests that the speaker is actively seeking out this product. Nevertheless, the 2nd part of the quote, "I 'd like to trade it in," suggests that the speaker may already have some tat and is wanting to exchange it for something else. This might recommend that the speaker values the act of trading and sees it as a method to get new items without investing cash. In general, the quote communicates a sense of curiosity and a willingness to take part in transactions.