Short answer, no. About 80-90% of the stuff you get will be worth a lot less than the cost of the crate.

The Salvaged Mann Co. Supply Crates are older, but still hold massive value. They were created to be extremely rare but hold the most valuable items, and this one is the top of the bunch.

The Mann Co. Painting Set is a tool item that, upon use, gives the player up to three random Paint Cans. It is represented by two metal buckets of paint, one spilling out yellow, orange and purple paint, the other bucket spilling black, green, and blue paint.

The item replaces the free, uncraftable items formerly given after spending $19.99/£15/€15/R$30/₽1220 in the Mann Co. Store. Upon using the item via the backpack interface, the player will receive a random item that can be found via the drop system (such as weapons, hats, and tools).

There is a less than 1% chance of obtaining an Unusual quality item through crates and cases. Unusual quality items can be obtained in any crate or case, but the effect pools may vary depending on the crate or case series.

Team Fortress 2 edited: STN-Trading is also a good and legit site, sometimes it is better than scrap! these are 2 sites that was at first only CSGO and H1Z1 trading sites but since has added TF2,DOTA2,UNTURNED and other games. they are legit!

0.33 represents a third of 1 refined (ref), which is 1 reclaimed (rec). 0.11 represents a third of 1 rec or a ninth of 1 ref, which is 1 scrap.

You can switch between your and your trade partner’s inventory. Add items that you want to trade into the “Your offerings” grid. You can use the chat box at the bottom of the trade window to coordinate the trade. Check the box beneath your trade offers when you’ve added everything you want to trade.

the site is always the same. Its just someone who hijacked your account, try to convince you to deposit your items into the site and then cancel the real offer from the bot and send you another with a fake bot impersonating the real one.

The Summer Claim Check is an action item represented as a Mann Co. Shipping airport baggage claim ticket, with information stamped in red ink on the bottom portions.