You can exchange your RUST skins for other skins with a similiar value easily. There are many RUST trading sites that allows you to trade items instantly between bots. Just login to the trading site, enter your tradelink, choose your items to trade and items you would like from a bot. Hit a "trade" button and wait for a trade offer from a bot. After few seconds you will receive trade offer. To accept it go to steam website, go to profile (click your avatar at the top-right corner), then click inventory and "Trade Offers".
Commission: The lower commission, the better valued skins you can get in exchange. Most of the sites have listed commission rates, so you can check if they are acceptable for you.
Trustworthiness: Trading site should has good reputation. It should be running from long time. The good way to check reputation of trading site is to check their social media.
Inventory: You should choose trading sites that have larger inventories, so you have more skins to choose from.
Most of the RUST skins are sold rarely, up to few sales a day and price on steam community market may change rapidly. Beacuse of that, we are recommending you to check if prices are accurate on trading sites of items you are trading. If they are underpriced, you should choose other RUST trading site. Note that they can have a bit lower value, because of a rake.
When you want to trade on RUST trading site, you should check if it offers you a way to lower a commission. If it does, you should follow steps on site you want to trade on. Most often you will have to add trading site domain to your steam nickname and relog to get lower commission.