Actually based on the current market standards ingots are 100 each.
So technically he is selling them at the market price of 100 per ingot. Tiggy, I recommend selling for 50-75 per ingot being as that price is > market sell price but < market buy price.
As for the stacks of iron blocks, 25000 per stack of iron blocks is less than what you get for selling a stack of iron blocks to the server market. Technically going for 40K/stack iron blocks should be less than the server market buy price but greater than the server market sell price.
HighRoller you are getting a great deal with 25K / stack of iron BLOCKS (9 stacks of ingots)