Got a $180K offer for my app. Should I sell?

On a second thought !

looking at your previous questions on hackernews, i now doubt whether you are asking all these questions just to drive traffic to brightjourney ?

What is your current advertising budget.

If your current revenue is the result of minimal / no advertising then why not try allocation a little more funds there and see the results.

Is there any scope for improvement to your product other than bug fixes ?

(Assuming you make $90k/year)

10x annual revenue I think flies by many investors books and wouldn't seem "outlandish". If need be you could probably meet somewhere in-between 5 and 10x. 2x seems like too low of a multiple.

I don't know if I agree. 10x seems to be the common theme a lot of people quote but I've never personally seen a statement that says this is an established standard (which books are claiming this?). I think there are multiple factors to consider when buying and selling, and claiming 10x annual revenue is standard is fool hardy.

It sounds like a lowball offer to me if it is really that profitable. But can you scale it further is the question.