Where and how to sell my iOS app?

I've been looking into selling an iOS app that I acquired last year and does around $5k TTM.
I have considered marketplaces like Flippa and Microacquire that provide some structure & eyeballs and I've heard there are some P&E firms / brokers that can also either find or be a direct buyer.
Anyone has gone through any of these and can share experience on where and how to do this?