Is there a valid way to see the best selling clickbank offers?

Well, are you talking about the "gravity" value?

Go to Marketplace and do a "Find Products" search with the search box blank. Sort the results by "Popularity".

You can look at the gravity to get a good measure. Gravity is basically the number of affiliates who have sold the product in the last 12 weeks.

No - this widespread impression simply isn't right at all. There are many products with single-figure gravities consistently outselling products with three-figure gravities.

Gravity High or Lower - Which Sells Best & Why?
Clickbank gravity - is there a sweet-spot here?
Understanding Clickbank Gravity
Clickbank Gravity

No; there isn't.

Neither conversion-rates nor sales numbers are published.

"Gravity" actually has no correlation at all with either conversion-rates or sales numbers.

"Popularity" does include "sales numbers" as one of the factors in its compilation, but ClickBank doesn't specify either (a) what the other parameters are, or (b) what weighting is given to each, so it's "all very mysterious". Still, it's true that overall, "high-popularity products" are likely to be making more sales than "low-popularity products".

Yes - pretty much.

There are some third-party websites which claim (the operative word) to be able to estimate sales numbers and/or conversion-rates from their own "secret proprietary algorithms", but these are all fictional: the reality is that those websites have no more information for their algorithmic inputs than are available equally to you and to me, in the Marketplace statistics published and regularly updated by ClickBank.

The only one would be "popularity", but I wouldn't call it an "educated guess", myself - more a "pure guess".

Are you asking because they might be products you'd want to promote, yourself, or (like me) products you'd particularly want to avoid promoting?

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