Sadly it doesn't matter if you go first or not,
doesn't help much if a PayPal-scammer goes first either.
The problem with accepting SLL inworld is, that you can never be sure that those SLL you receive are not stolen (or "fraudulent" as LindenLabs calls it), there's just no way to check that.
If they were stolen, LindenLabs will come and get them sooner or later and probably even suspend your account for a couple of days/weeks.
Not saying you're a scammer, but you might be and even if you're not, those SLL you got might still be "fraudulent" since we've no idea where you got them from.
Just telling people to be careful, their choice to trust you or not.

Ah, yes I suppose you're right. If the L$ were stolen LL freezes wherever that linden ends up. I get where you're coming from. For those who would be interested in buying I'm more than willing to show the transaction history where I got those lindens, and when. With that said, I'm really only interested in getting a small amount, around $20 or so is all I really need. But just saying I have more to trade if things go smoothly.
But again what you say is very true, and I'm willing to do whatever the buyer needs to feel at ease. I did have a gyazo picture of me cashing out over $3,000 USD already this month through SL, however that could easily be modified of course, and means nothing to someone who has never used SL before! I could share the screen over skype or something like that to show. Just really need these BTCs soon! Haha.