Also, just as a note, you've opened yourself up to the possibility for being scammed yourself, though I don't believe this is what's going on here.
Scammers are using posted email addresses to reach out to individuals directly, pretending to be forum members from sales threads.
you've posted your email at least two times in sales threads.
r*******ter@y***o.com
The only way someone could be trying to steal your money would be if they used your PayPal to purchase a knife here and have it sent elsewhere.
I'm sure
Spark
can confirm the shipping address that was used.