It looks like 50k is a lot of money and you are wondering why that amount is being asked for. Based on the existing answers, it seems like the amount is up for negotiation and at the time of publishing, no one was sure what the right amount should be. It seems like 10k is a more reasonable amount, but it really depends on the situation. Ultimately, it's up to you to decide if 50k is a fair price for what you're getting in return.