Simple trading bot

Hello everyone,

I'm working on a small project for a game I play called counter strike. It comes with a web application which essentially allows you to trade your own 'skins' (skins are the guns you see in this link https://i.gyazo.com/e2407660e5f7d207fa616648053f1aa9.png). Each skin comes at it's own price as you can see in the link above. What I would like sikuli to be able to do is identify the price of my one skin and then work out which is the best skin to trade with the other person.

For example, in the screenshot you can see my skin is valued at £0.05, the other person has a range of skins all of different values. I would like sikuli to be able to do more than just realise that trading my £0.05 for their £110.90 skin will make me money. The reason for this is that this isn't a fair trade at all and so the other person definitely won't accept my offer. What I want is Sikuli to work out what is a fair trade, but where I still profit. For example, it uses a formula such as ('price of my skin' x 1.05) and another ('price of my skin' x 1.15) so that I make anywhere between 5% and 15% profit.

The reason I am posting this question is because I have only owned this software for 48 hours and never coded before, so my ability for a complex process such as this is well out of my reach. I have spent the last 2 days learning all of the basics and feel comfortable with the software.

I would be so grateful if anyone could lead me in the right direction, let me know some scripts which will make this easier or even code some parts of this.

I think this would be a really fun project to work on with the talented coding community and can't wait for some replies:)

(This is non-profit as values are just an in-game value that cannot be exchanged for real money).