Autobuy Script on OPSKINS.com

There is a website called [[login to view URL]], that is basically an outside of steam, market. I would like a program that is able to automatically purchase any deal that goes above a certain discount of the average market price with my OPskin funds. For example, if someone puts their $100 knife on OPskins for $30. My program would automatically purchase the knife since it detected that it was put up way below market price. This should not be too hard to make and if needed, instead of a program it could be a personal chrome extension just for me. I want this to be completely original and for me only. It has to be very quick to be able to purchase the item before someone else can. My internet is fast but the program has to be fast acting as well for it to work. All the program needs to be able to do is purchase any item put on the website that is a certain "set" percentage below market price. It doesnt have to automatically trade it to my Steam account, it just has to be able to purchase it so I can be the first one to get it once its put up on the [url removed, login to view] later I can manually trade it to my Steam account. This is a chrome extension used to identify the discount of an item put on OPSKINS to the average market price. Maybe this can combine with program/extension created to identify the good deals and then automatically purchase. Opskins also gives out an API key, and I have a website where they have all their NODE scripts if that can help anyone. add me and put on the add request that your from Freelancer and your username so I know which bid you are. This concept is not too complicated and I think some of you are able to get the job done. Thank you so much for your time.