Your paper is ready for sale, and it is a bit unreasonable to pay a deposit, especially when you say 500 to 1000.
Paying a deposit has many disadvantages. One is to keep you waiting, and when you can't send the log you want, I'll change it for you. Even if the paper can be published, the person who receives the deposit will find various excuses to raise the price for you to send, so you are very passive.
Generally, the intermediary who receives the deposit now can't do the transaction of Taobao shopping mode, which is the case with many paper networks. The deposit is ok, but the author will confirm that the payment is reasonable after the paper is distributed. If only the intermediary receives the deposit and does not impose any restrictions on the intermediary, then you are very, very likely to be cheated when you send a paper. Because if you don't listen to the arrangement of the editor, your deposit will be wasted. . You can't return it. Be careful when distributing documents. If you ask, it will cost a lot of money. If there is no constraint, try not to hand it out. It's easy to be cheated. After you are cheated, don't go to your company to talk about it. So what would you do? Will the deposit be pursued? I hope everyone will be cautious and crack down on the mode of issuing papers and collecting deposits without any constraints.