Mint Modern Chinese Stamps - What Are They Worth?

Hi Chinese Stamps Collectors!
Below is a small collection of modern Chinese stamps: mint never hinged in superb condition.
What do you think they are worth, please?
Thank you very much in advance!












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I am currently mounting my China issues from collections
of the past 10 years.
All common and CTO mostly.

I am not a China specialist, but from my forays around the net recently to fill gaps, I have been seeing sets offered for around $5 -$12 US a set.

Specialists may well correct me, and you may well have a rarer set amongst your collection.

Be wary of the albums you are showing, they are cardboard and attract moisture, often the stamps tend to adhere to the page if your environment is humid.

Rod222, thank you very much for the advice!