Hi!! Welcome home 🙂
Just to add to the general conversation, learn to use the Auction house. Just type /AH anywhere outside a mission. It might seem a bit daunting but as a general rule orange salvage will fetch around half a million inf a time, give or take a hundred thousand. Recipes are an odd group, some will fetch a fortune, others will fetch barely a couple of hundred inf. Learn how much stuff sells at a shop or vendor then decide if you want to sell it in the AH or the shop. Personally I sell white and yellow salvage at a shop and orange salvage on the AH, then check each recipe by dropping it into the AH window and clicking find. Sometimes I have to click a few times for it to come up as it's temperamental.
Sometimes crafting an enhancement from the recipe can make you far more than just selling the recipe, but it's a case of if it's worth the extra cost for components and crafting costs to whether it's worth it. A purple recipe will generally fetch around 10 to 14 million, and the crafted enhancement will fetch around 20 million. If you have the components handy then it can be worthwhile crafting, otherwise sometimes it's just more cost effective to sell the recipe.