Not in the OED but common in my experience

Priciest - most pricey!

...and the prettiest package is the priciest. (alliteration as a bonus!)

http://www.thefreedictionary.com/priciest

https://www.collinsdictionary.com/dictionary/english/priciest

Priciest - most pricey!

...and the prettiest package is the priciest. (alliteration as a bonus!)

Not in the OED but common in my experience, and covered in both British English (Collins) and American English (Merriam-Webster) dictionaries:

https://www.collinsdictionary.com/dictionary/english/priciest

https://www.merriam-webster.com/dictionary/Priciest

http://www.thefreedictionary.com/priciest

Not in the OED but common in my experience

Priciest - most pricey!

http://www.thefreedictionary.com/priciest

https://www.collinsdictionary.com/dictionary/english/priciest

Not in the OED but common in my experience

Priciest - most pricey!

...and the prettiest package is the priciest. (alliteration as a bonus!)

http://www.thefreedictionary.com/priciest

https://www.collinsdictionary.com/dictionary/english/priciest