Need help to know how to know which items are worth more fg. and also how to play ladder slasher back again. Thanks

Usually just watching the trading forum is a good way to start.

You will probably get a lot of messages about your two dex charms as they are very expensive. Rule of thumb, if you don't know a price, make a topic or price check.

You have some extremely powerful and expensive items still, the t1 39 dex charm and 55 str 40 charm for example.