I have been messing around on csgo lounge as well, cpl of questions for you more experienced folks.
1. When I go to Steam Trade with someone I cant offer keys for there skins, how do I do this?
2. There are a lot of trades on the lounge that say they wont accept friend requests and don't link there trade url but say steam trade only.....how do you do this without the link?
Thanks
2. on csgo lounge on their thread at the bottom right of the comments is a little button which says "Steam Offer" click that and it will take you to the steam trade window.
1. have you just bought these from the market? if so then you have to wait 7 days before you can trade them (ps. never buy keys from steam market or in game, you can always find people on /r/globaloffensivetrade which will sell you them for £1.20)