I would say the average profit per watch will be around $10 to $30... maybe $50... but this depends on the watch... if you pay $150 for Submariner with ETA the dealer has to pay the Express-shipping... so there are only ~$120 left... the ETA movement isn't for free too... lets charge $30 for it so you have $90 left without the additional costs for the case, the guys who dropship the watches, the packing and so on...