​Planning to turn my kpop blog into a niche product aggregator

I run a kpop blog and recently got access to Bunjang’s API through a connection. For context, bunjang is South Korea’s biggest secondhand/resale platform, think a Korean eBay/Depop hybrid. Kpop merch happens to be one of the top categories on there so they were open to letting me integrate it into my blog.

The idea is pretty straightforward: pull bunjang listings and surface them directly on my blog for my existing readership, without holding any stock myself. My audience is already looking for this stuff, so it felt like a natural extension.

For monetization, I’m thinking commissions on completed purchases by redirecting readers to bunjang, layering in display ads as traffic grows and using the audience I already have as a launchpad for my own adjacent products eventually.

That said, I keep coming back to a few concerns. Bunjang could restrict or start monetizing the API if things scale up or change. margins on secondhand goods tend to be pretty thin and even with an existing blog, building meaningful purchase driven traffic would take some time.

Has anyone built something similar on top of a marketplace API? Would especially love to hear how you handled the platform dependency risk and whether this business model was actually worth pursuing