No, but you can get marked by steamrep if you trade with a marked steamrep scammer repeatedly and knowingly.

Would be very useful, the people who only accept metal, or craft hats as 1.33 or 2 clean weps as 1 scrap, or please don't add me before posting, or only add me if you agree with my prices etc would like this idea so much.

Before you trade with anyone make sure they are clean on steamrep, check when their steam account was created (don't trade with anyone less than 9 months old), check if they have sourceop rep, never go first (unless their steam URL matches a steamrep admin, middleman or trusted seller (MAKE SURE URL MATCHES).
Make sure they send as a PERSONAL PAYMENT (Family and Friends), and include in the notes whatever items they're paying for.

Also, chargebacks aren't that common as long as you do the above steps, I've only been chargebacked once, but it was a mistake and he gave me my 47 keys back.

I would recommend selling in parts to different people, that way no one person can chargeback ALL of the items.

experienced cash trader, 10 pages of sourceop rep
http://forums.sourceop.com/threads/130927-RaXoR-s-Rep-Thread

When everyone's speculating, the opposite will happen.
For example, everyone hoards the #40, waiting until it's a peak price to sell.
In actuality, no one wants a crate 40 because everyone has one.
And then the price drops until people get bored of it.
Then slowly the price will rise, very slowly.

this is what happens all the time with the tf2 market. new items are released and people speculate so much that a bubble is created, then it pops.
like people didn't know buds would be worth that much when they came out.
same goes for salvaged 30 crates.

so just like 40 crates (people horde them in hopes they will rise like crate 30 and they dropped like 6 keys because of this) the tux will have a bubble, be hoarded, and then pop like nobody's business.

tf2 trading.