This project is a website for buying and selling digital products.
There are 2000+ different cards that can be bought or sold, but they are identical in every aspect.
So, I want a system where the buyer of a card puts in his maximum buy price, and the seller of a card puts in his minimum sale price.
If the buy price is higher or equal to the sale price there should be an automatic sale. This is just the way stock markets are working.
The buyer puts money into an escrow account before he gets his card, and the seller gets the money when the card is confirmed transfered.
Please give me a realistic bid and time frame.
If there exists an open source program that is doing this, feel free to use that and customize it for me, but tell me if you are planning on doing that. If you do a good job on this, I have several big projects as well.