The difference in price between normal eggs and rotten eggs in the market depends on several factors, such as the supply and demand, the quality and freshness of the eggs, and the bargaining skills of the buyers and sellers. However, in general, normal eggs are more expensive than rotten eggs, for obvious reasons.

Normal eggs are usually sold by weight or by dozen, and the price may vary depending on the type of eggs (such as organic, free-range, cage-free, etc.), the size of the eggs (such as small, medium, large, extra-large, etc.), and the season of the year (such as spring, summer, fall, winter). According to the U.S. Department of Agriculture (USDA), the average retail price of a dozen large white eggs in the U.S. was $1.37 in May 2021.

Rotten eggs are usually sold by smell or by sight, and the price may vary depending on the degree of rotteness (such as slightly rotten, moderately rotten, extremely rotten, etc.), the color of the eggs (such as green, black, brown, etc.), and the purpose of the purchase (such as for pranks, for experiments, for composting, etc.). According to a Quora user who claims to have bought rotten eggs from a farmer in India, he paid 10 rupees (about $0.13) for a dozen rotten eggs in 2019.

Therefore, based on these sources, we can estimate that the difference in price between normal eggs and rotten eggs in the market is about $1.24 per dozen on average. However, this may not reflect the actual market conditions in different regions and countries. Also, please note that buying or selling rotten eggs may be illegal or unethical in some places. So please do your own research before you decide to buy or sell any kind of eggs.