Collectibility is not a straightforward formula. It involves several different factors. I will cover this by ratings with any books that I review in the blog. The ratings are my personal experience and from market information and are not necessarily fact.

Average Price:

Average selling price online

Specialization Category:

This is the cookbook collecting specialization or category of cookbook that a book can be classified under.

Availibility:

How easy or difficult the cookbook is to find. Rating is based out of 10, 10 being the most difficult to find and 1 being the easiest to find.

Popularity:

How popular or sought after a cookbook is at the time of review. Rating is based out of 10, 10 being the most popular and 0 the least popular.

Investment Outlook:

The rating projects how a cookbook will fare in the future in terms of value. Rating is based out of 10, 10 being the best and 0 the worst.

Final Collectibility Factor:

The collectibility factor rating is based out of 10, 10 being the best and 0 the worst. It combines the ratings for Availibility, Popularity and Investment Outlook.