Enter all raffles on scrap.tf and start getting free stuff - build up your inventory. Sell items for scrap/ref and start buying your medi cosmetics etc.
As for the trackpad suggestion.. No idea, get a mouse 😮
A lot of people like backpack.tf because it's where you go to sell your for items pure instantly which can turn into real cash from selling keys to steam market(another player)
Marketplace I find is just another reference for backpack or guideline/trade history. (Homework basically)
Scrap.tf takes patience to sell your items and a lot of people don't have that.
I disagree with the trading convenience because there's paint bidders/items can be overpriced. You have to be MEGA careful when selling your items.
Scrap.tf is really great for raffles and B