The reason larger engines have a higher sale price is all down to - YOU!

In a free market it is essential that sellers charge a price which multiplied by the resulting volume at that price, gives them the most profit. They can ask a higher price for a bigger engine simply because people are suckers and are willing to pay it. If you all refused to pay more than the price of the 12lb engines, manufacturers would face a simple choice - sell 30lb+ engines at that lower price, or stop making them if the cost of manufacture is greater than the selling price, or find ways to manufacture them more cheaply so they can sell them at the lower price at a profit. Sellers can only get the price that customers pay. The cost of manufacture is controlled by manufacturers. The selling price in the shop is controlled by customers and by no-one else - don't buy it and the price will come down.

H