If you produced 20 spiders this year, you aso produced 20 normals from the spider clutches alone. If you know that the economy sucks and don't think you can care for, or sell at market prices, 40 normals and spiders, why the hell are you producing so many snakes when your family's well being and finances might suffer? We didn't go into a recession over night, and surely your sales last year were a good indication of what things would be like this season. That's where I would think that greed comes into play.
Edit: If you have so many snakes you can't sell at market prices, you should be selling them to a wholesaler, if anything. Not advertising them for individual sale in public at wholesale prices, in turn, contributing to lower market prices for everyone who is willing to do the work.