"it’s impossible to compete with such a price" - it's just in your head. Your model is unique and very well made, $100 would be like a steal. Never look at undercutters when setting your prices, there will always be smartasses who will undercut you no matter how low you will go. Why do you want to compete with them? If you think that nobody would buy this model for $100 from you, i can tell you one thing - you have never tried to set that price for your model.