How much is the 1959 Special Stamp Special 30 paper-cut chicken stamp worth?

1959 Special Stamps Special 30 "Paper Cuts" (4 sets), issuance date: January 1, 1959, circulation: 7.5 million sets (not large), and after more than 50 years of consumption and loss, now a complete set of new

There are fewer high-grade products.

The current market prices of this set of stamps are: (new top grade) selling price 500 yuan, purchase price 320 yuan, transaction price around 410 yuan; (cancelled top grade) selling price 25 yuan, purchase price 12 yuan, transaction price around 19 yuan;

Letter sales stamps are determined based on the comprehensive condition of the four stamps.