I do computer repairs/services for people I know, such as installing graphic cards and such.
Otherwise, I merchant rs2 gp. I buy off a reliable supplier (usually r2 but his prices are a bit high to merch off) via Interac Transfer and then resell via paypal for $6 an unit + $5 - 10 (depending on transaction total) to the final price to cover excessive fees.
For example, I buy 100m off r2 for $500. I resell that for $600, = $100 profit. Small but $100 can get me quite a lot..
Reason mills are easy to sell for high prices via paypal is the lack of sellers accepting it due to the fact that paypal is a bitch, putting holds on your account making your account unusable and just how it annoys people.. and of course, how people can chargeback. But by now I have learned every method to avoid these problems.
I'd like to share, what I do is this:
To prevent chargebacks, right when the money is recieved I quickly make a forward towards my bank account. So if they do chargeback successfully the money will already be in my bank ready for use, while my paypal remains in negative balance. No worries, make a new paypal and move on, ditch the old one.
Also, I upgraded my account to Premier. Premier and Business accounts offer additional protection against these scammers. How so? When someone files a claim your funds are still useable until the claim is escalated up to a Paypal Claim. Plus, Premier looks better than "personal", so it looks better to paypal and gives them less suspicion.